Neil Weinberg FanGraphs Q&A – 9/17/14
2:16 |
See you soon! |
3:00 |
: Alright, hey everyone!
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3:01 |
: Let’s do some chatting.
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3:01 |
I would obviously take Pedro over Kershaw in terms of level of peak years (those dominant yrs during the PED era is insane). But in terms of sustained greatness over a longer period of time….have to give it to Kershaw if he does this a few more years…Agree? |
3:02 |
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3:02 |
Hey Neil, thanks for doing this. As a batted ball type, how stable is IFFB%? What kind of sample size thereof might be meaningful? |
3:02 |
: Let’s fire up the ol’ correlation machine!
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3:04 |
Classification issues are an issue here, but I wouldn’t make too much of two months of pop ups, for example regardless. |
3:04 |
In your opinion should defense position adjustments be increased, decreased or stay the same |
3:06 |
You know a SS is better than a 2B. Is it 10 runs? I don’t know, but it’s greater than 0 and it’s probably less than 20. 10 was out best guess a few years ago, but these things can change as baseball changes. |
3:06 |
As a general rule, if a player’s UZR is outstripping the positional adjustment (either positively or negatively), could/should that player be moved up or down the defensive spectrum? |
3:08 |
: Depends. If they do it for a long time, (like post +20 at 2B every year), they can probably move to SS. But, it’s never quite that simple because some players are good for reasons that don’t translate as well to other spots. Like a LF with an insane arm won’t play up in CF the same way one with insane range would. Positional adjustments are estimates built on complicated interactions. So, in theory, yes. But in practice, it is tricky.
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3:08 |
Do you think that JD Martinez can do next year what he has done this year? |
3:09 |
But I do think he’s probably no longer a AAAA guy. |
3:09 |
Why is the distinction between earned and unearned runs not meaningful when evaluating pitchers? |
3:10 |
If you just totally run past a fly ball in the OF, you aren’t getting an error but the pitch got a routine fly out. |
3:10 |
Is there any way to compute the confidence interval/standard error for WAR or components of it? |
3:12 |
But, yes, WAR is an estimate with uncertainty around it. 100%. |
3:12 |
I am trying to look at all players stats over a specific timespan, May 1 to today, how do I do this> |
3:13 |
: You can’t do this on the site right now. You can do individual players like this, or you can look at all players for certain intervals. I know this is something people would like and it’s on my list of stuff to recommend.
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3:13 |
How accurate are park adjusted stats? |
3:13 |
: Define accurate. Seriously, not being a jerk. What do you mean when you say accurate?
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3:14 |
Does UZR or DRS take into account base runners when determining the runs saved per play? Specifically, a SS with a double play opportunity (runner on 1st) will shade towards the middle, so ground balls up the middle theoretically should be easier to get to. Or if the outfield is in late in the game because there’s a runner on 3rd with less than two outs, a standard fly ball wins, so the OF might not try to catch that ball. Is that considered a failure of a routine play? |
3:15 |
: So these little basic things where you might shift a little are not considered by UZR and I don’t believe they are by DRS either. Serious shifts are thrown out. This is definitely a place where measurement error creeps into defensive stats and I suspect we’re going to see improvements to this, maybe as soon as next year.
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3:15 |
I have grown dissatisfied with Excel’s graphing capabilities. Is there any other (cheap/free) software you might recommend? |
3:16 |
: I use Excel a lot. I have trouble with Google Sheets graphing. Programming types like R because you can tell it to do whatever you want, but you have to learn codes rather than click. I don’t have a good rec, otherwise. Anyone?
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3:16 |
Do you know if there exists a version of WAR for pitchers that is based solely on pitches thrown (using Pitch F/X data or something similar)? It seems odd to credit pitchers for throwing bad pitches that result in strikeouts or to penalize them for good pitches that end up as home runs. |
3:17 |
: Perhaps someone is working on this, but nothing is out there. The tough thing about this is deciding what is a good pitch. It’s really hard to build a metric that knows if your high fastball was good or bad. That may sound silly, but try it! Very hard.
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3:17 |
When calculating pitcher WAR, it’s said that a pitcher’s run prevention impacts his own run environment. In the sense that teams score fewer runs when he’s on the hill, so one should expect him to give up fewer runs – sure. What I’m unclear on is the purpose – either mathematical and/or qualitative – on separating pitcher from this aspect of his run environment. Pls help, Lord Protector of Number ‘Splainin. |
3:21 |
In other words, if you allow 1.00 RA9, you’re influencing the run environment in a way that makes it easier for your team to win because they can score fewer runs to achieve the same thing. It’s kind of tricky to explain and I’m not sure I did it well. There will be a section on this when I update pitcher WAR in the next couple weeks. Sorry! |
3:21 |
For xFIP, is the HR/FB comparison percentage adjusted for park? Should it be? |
3:22 |
: No and no. If you want to park adjust, use xFIP-, which is park adjusted xFIP.
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3:22 |
Can you explain why hitters receive 57% of WAR each year vs. pitcher’s 43%? Do you think this needs to be tweaked at all? |
3:24 |
I don’t see a strong argument for moving away from 57/43, but I also don’t necessarily think it should be taken as gospel. If you can make an empirical argument for a change, there are many people who would listen. |
3:24 |
Hi Neil, Corey Kluber got a lot of press on FG last year (including the Corey Kluber Society) promoting him as a breakout candidate. Now that he has done that this year (and exceeded even the optimistic expectations), who are your top 2 or 3 candidates to do the same thing next year? Thanks |
3:26 |
Good question though. Might have to think about it! |
3:26 |
Neil you rock! A question re: BIS and batted ball types (GB/LD/FB%). How reliable are these figures? Do you trust these numbers? |
3:28 |
: I’m not sure of their official reliability, but typically you can trust GB vs LD+FB pretty well. It’s the LD and FB distinction that’s tricky. I would say you can trust these numbers within a few percent, but don’t look at a 43 FB% and think it’s definitely 43%, because the reality is that there’s no perfect cut point.
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3:28 |
How come FG does not offer pitcher’s RAA in it’s value section. It gives RAR and WAR, but not RAA? |
3:29 |
: I guess we could? I’m going to do a long thing on pitcher WAR in a week or two, so you can draw on that if it’s important to you.
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3:29 |
Do you find either the BIS or PITCHf/x plate discipline numbers to be more reliable? Is it just a matter of personal preference? |
3:31 |
BIS is good, it’s juts Pfx is a little more safe in terms of what you’re dealing with |
3:31 |
what few players differ significantly in FG defense measures than in other references for defense. ie SDI or other? |
3:32 |
: Don’t know off hand, but a good way to check is to go to our fielding section and compare UZR and DRS. We use UZR in our WAR calcs, B-Ref uses DRS, so you can compare both on our site.
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3:32 |
How will run values be gathered from field f/x? or will it just be speed and route efficiency. |
3:33 |
But I could be wrong, I’m not very creative. |
3:33 |
i noticed that Miguel Gonzalez has a LOB% this year of 84.5, which is absurd and surely not sustainable, while Strasburg has a LOB% of 73.9, which is in line with his career average but seems low for an elite level starter. is this an actual skill or just the result of good/bad luck and timing (like hitting with RISP)? |
3:34 |
: LOB% is correlated with skill because good pitchers allow multiple hits and walks per inning less often, but there is a big randomness component. So an elite starter might hover around IDK, 78%, but bounce from 73 to 82 while an average starter would bounce from 69 to78 or something
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3:34 |
@Lorenzo Tableau Public is free and can do something amazing data viz + graphing http://www.tableausoftware…. |
3:34 |
What do you think is a reasonable comparison of what Buxton will provide compared with what fellow speedster, Hamilton, gave this year offensively? |
3:35 |
: Buxton is probably slightly less talented in the field and on the bases relative to 2014 Hamilton, but the bat should be much better.
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3:35 |
Why not keep it at 57/43, but make the extremes closer to the midde? |
3:36 |
: This is an argument for regressing defensive numbers, which you can’t exactly do if you don’t shrink their importance. You could regress big values, although I’m not a big fan of that strategy.
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3:36 |
Good question is code for ‘I dont have an answer.’ |
3:37 |
: Not sure it’s code, but basically yes.
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3:37 |
Is it better to use Def, DRS or UZR to evaluate a defensive player? |
3:37 |
: Def, because it includes the positional adjustment. DRS and UZR are relative to position average, so comparing a 1B and SS requires you add in the positional adjustment
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3:38 |
Would Kershaw be your MVP this year? |
3:38 |
: I think so. I haven’t fully decided and it’s close enough that someone could catch him down the stretch, but I’m leaning that way.
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3:38 |
Jason Kipnis, peculiarly, is regarded by FG/BBRef defense as ~6 runs below average, whereas BP’s Fielding RAA has him as ~9 runs *above* average. Faced with a conflict like that, how would Neil Weinberg treat the extreme divergences? |
3:40 |
: Probably use the FRAA number to info the other two. So DRS/UZR see him as -8 to -10 (+2.5 pos adj), so I’ll give him a little bonus for his good FRAA mark and call it something like -5 to -6
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3:41 |
does yusmeiro petit hold down that sp role in sf for next year too. What can we expect for him if he does? |
3:42 |
: I don’t know if the Giants have anyone obvious to push him out coming up, but I think he’s probably capable of being an average starter? I confess I don’t know about his durability. But he’s capable of performing at that level while on the mound
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3:42 |
Andrelton Simmons has a 73 wRC+ (-16.8 Off), but because of his defence (20.3 Def) he has a 2.3 WAR, do you think that is accurate of his value? |
3:43 |
: That seems about right.
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3:43 |
what’s andrew susac’s role next year in San Fran? |
3:44 |
: I don’t suppose he can play anywhere other than catcher? Nice backup.
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3:44 |
Would Matt Kemp be better off as a LF/RF or as a DH? |
3:44 |
: Let’s check his current numbers!
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3:46 |
: DH, if you buy his bad defense so far. If you think it’s because of the injuries or whatever and he’ll be better, then LF/RF. He has performed in a way this year that would make him better off as a DH if he was going to do this again
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3:46 |
Is it more difficult to generate an outlier WAR value in the current environment or back in the deadball/pre-integration era? I’m assuming there’s more talent, currently, so is it easier or more difficult for the best to stand out? |
3:47 |
: Probably in the earlier era, but that’s based on a few seconds of thinking. Could be wrong.
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3:47 |
Who is your favourite for most overpaid free agent this year? |
3:49 |
: Hanley or Shields. Not that either is bad, but they are the kinds of players I can see one or two teams going crazy over relative to their worth.
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3:49 |
: Hanley, because a team will dream about his health. Shields, because a team will overvalue his durability.
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3:49 |
What should the Tigers do with Nick Castenallos? Absolutely dreadful defence. |
3:51 |
2) Move him to a corner OF spot now and get the transition started. I would let this play out for another year and see. This isn’t sustainable, but it also might be a mirage. Need more data. |
3:51 |
Dominic Brown has a -1.7 WAR, was last year just a fluke? |
3:53 |
: If he doesn’t hit for power, he’s not a good player. He did last year, but hasn’t in his other 1000 PA or so. I wouldn’t say fluke exactly, but he’s probably not an MLB regular.
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3:53 |
Is Ryan Braun’s days as a superstar over? |
3:54 |
: I’m not sure. I think so, but I don’t feel great about the answer. A fully healthy Braun in 2015 is still very much an MVP candidate.
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3:54 |
are you good with gifs? If yes, then what is a good way to capture a video from mlb.com and make it into a gif? (mac) |
3:54 |
: I don’t use a mac, but let me see. I know I have Mac instructions somewhere…
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3:55 |
: I’m told LICEcap is an option?
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3:56 |
In what ways should Buxton’s bat be better? |
3:58 |
: I’m not a scout but everyone I trust says he has an above average hit tool with potential for plus power.
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3:58 |
What went wrong with Albert Pujols |
3:58 |
: He got older.
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3:58 |
How can I see player IDs without going to excel? |
3:59 |
: You can’t, although they are in the URL for each player’s page. If you just want one of them.
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3:59 |
Could Buxton realistically pass enough eye, not stat, tests in the AZFL to accelerate his debut? |
4:00 |
: I don’t think anyone doubts his ability, it’s more a matter of getting enough PA to develop into his potential. I don’t think AFL can offer a huge boost to that, but if he kept developing while injured, we may find out about it at AFL
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4:00 |
For comparing players today against players from earlier decades, how much would you adjust (estimate) for the talent improvement. If you were trying to come up w a single number rating how would you factor in strength of competition? 5% increase for each decade a decent estimation? |
4:01 |
: That seems right, basically. But there are going to be weird spikes during integration and expansion, too.
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4:01 |
Favorite baseball simulator or video game ? Any simulator you find more “accurate” than others? |
4:02 |
: I don’t really get into these. Used to play 2K and MVP but really haven’t had time for more than a simple Ottoneu team in about two years.
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4:02 |
Indians Fan here (if you oouldn’t tell from the Kipnis questioning), and I recall that the 2013 Defensive runs below average *approximately* equaled the 2013 ERA-FIP gap. Not at all scientific, but the current approximate equality of team DRAA and ERA-FIP (ra9-fip ideally, but that’s not how FIP’s scaled) seems to be the argument against regressing defense. Is that about right? |
4:03 |
: Yeah, in a basic sense, WAR correlates with real wins better with defense like this than with defense being narrowed. Just saw a bit of work that suggests it might actually be more like 60/40 rather than 57/43. Hard to say, but we’re close…I think
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4:03 |
Would you trust FIP or K-BB% for minor league pitchers? |
4:05 |
: For minor leaguers I would probably recommend looking at all of the components separately. So K%, BB%, HR/9, etc. FIP and K-BB% are great, but we care about projecting their future and certain problems are easier to fix than others. So you want more info.
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4:05 |
Which teams have the best young pitchers? |
4:05 |
: Mets?
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4:05 |
What is the best for making GIFs on a PC? |
4:06 |
: Best, no clue. I use HyperCam and iWisoft video converter
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4:06 |
Best resource for old game footage? Is MLBAM the only place out there? Have they sufficiently wiped out any and every other site? |
4:07 |
Seems like an easy win for MLB to release old games for free. |
4:07 |
Im trying to look at all Twins stats over history for the month of June, but it wont let me, how do I do this without going through each individual year? |
4:07 |
: Yeah, we can’t do that here. B-Ref might be able to with the Play index.
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4:07 |
Who do you think performs better in 2015, Stroman or deGrom? |
4:08 |
: deGrom?
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4:08 |
Is it possible to create a report that shows every players rookie season? Or 3rd season? I get one that shows each players age year, but want each players certain service year. Possible? |
4:08 |
: You can do rookie (click the rookie check box), but for now we don’t have service years as an option. Just age. Sorry!
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4:09 |
: Quick break. Keep asking questions and I’ll pick up in a second.
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4:12 |
Imagine a regular fangraphs reader for 2010-2013 who hasn’t read much this year (due to weird constraints). What do you like talking about on here, Neil? |
4:13 |
: I’m the site educator, which means it’s my job to help readers and the public understand and use our data and features and stats. But normal baseball questions are cool too!
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4:13 |
Thanks for the chat. FG authors often reference whiff and GB rates for different pitch types when evaluating pitchers. When do I find that on FG, and what are the league averages? Thanks. |
4:15 |
: Go the player’s page and click the Pitchfx tab. You can get that for individuals. I don’t know if the specific pitch averages are anywhere on the site, to be honest.
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4:15 |
How long should we wait before passing judgment on rookie hitters? Both Travis D’Arnaud and Wilmer Flores were awful to start the year but have recently picked up. Should we believe in them, or wait to see if it’s a mirage? |
4:16 |
: At least two years. Every single PA is relevant, but you need at least 500 PA or so to tell you anything, and that number increases when you’re talking about players who are new to the league and still learning. Don’t give up on anyone too early. You can lose confidence but don’t bail
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4:16 |
What was your opinion of Stroman missing Caleb Joseph’s head? It looked like he was trying to hit him. |
4:17 |
: Didn’t look good. My guess is that he was trying to intimidate him with no intention of actually hitting him. But that is reckless and dangerous. But, again, I don’t really know.
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4:17 |
Im trying to make a GIF using iWisfot but it comes out as 60 different pictures, how do I fix this? |
4:17 |
: That’s…weird? Probably need to change the output format. You want animated gif
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4:18 |
Whats wrong with Joe Mauer? |
4:19 |
: This is basically 2011 again. He was excellent just last year. Some age, some health. Probably going to be good again next year.
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4:19 |
Thanks for the gif help. Its working fine but what is a good fps rate? |
4:19 |
: Capture at 30, playback at 10 is how I do it.
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4:21 |
how is the yearly positional adjustment for pitchers derived year to year? because those values seem to constantly change. |
4:21 |
: Doesn’t look like it’s constantly changing? What do you mean?
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4:21 |
Stroman has been suspended 6 games, one less than Papelbon. Do you see a problem with this? |
4:22 |
: Yes. The league does not properly handle head hunting, fighting IMO. Papelbon deserved a suspension for that, but going after someone’s head should be 15 or 20 games I think.
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4:22 |
What is the logic behind the DH defensive adjustment? Why can’t a DH’s defense simply be N/A? |
4:23 |
: It has to be something. Otherwise a .400 wOBA (600 PA) DH would be equal to a league average 2B .400 wOBA (600 PA) even though the 2B is way more valuable.
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4:23 |
There is no way Stroman was going after his head, giving him 15 or 20 games would be insane |
4:24 |
: I was speaking about head hunting in general. I don’t know if Stroman was in particular.
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4:26 |
How do upload GIFs to intenet? |
4:26 |
: You can use Twitter, or Gfycat. Or upload them to a website. Lots of options
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4:26 |
A few words about how awful Brad Ausmus is please. |
4:27 |
I am unhappy with his performance. |
4:28 |
: But this is a family website and I try not to use rough language!
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4:28 |
Doesn’t a DH’s -17.5 adjustment speak to how bad of a fielder he is relative to his peers? Theoretically, at least |
4:28 |
: Exactly!
|
4:28 |
Will Alex Gordon finish in the top 5 in MVP voting? |
4:28 |
: Let’s see. Who will the voters favor ahead of him….
|
4:29 |
: I think right around 5th would be by guess of his location. I think I would say he could be as high as 2 and as low as 10 for me. Probably around 4-5?
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4:30 |
I made a GIF! http://www.gfycat.com/Insis… |
4:30 |
: I was very proud of my first one too. It was a big day at the Weinbergs when I learned this.
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4:31 |
with a manager like Ausmus, do you think the front office needs to step in and “suggest” some things to him? obviously there is some learning but that team can’t waste a postseason on poor strategy. and the Tigers aren’t the only team like this. |
4:32 |
: It’s tough to say. They should do this, but it’s also not clear how much of this they support. The Tigers are an extremely tight-lipped FO, so you never get a sense of how they feel about things. I would guess that they aren’t as unhappy with him as the fans are, but it also might be a case of Ausmus being allowed to use judgement within a given framework.
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4:32 |
: It could also be the case that FO know that strategy is limited enough in impact that they don’t want to mess with the team midseason? Don’t know.
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4:33 |
Who are your top 5 AL Central regression candidates for 2015 (individual players)? |
4:34 |
: Altuve? Carter? Does Moss count? that’s not five…
|
4:34 |
Central, Neil! |
4:34 |
: Oh dear.
|
4:34 |
: Um…
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4:35 |
: JD Martinez.
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4:35 |
: Brantley
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4:35 |
: Wade Davis just because gravity.
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4:35 |
How do I fix framerate? |
4:35 |
: HyperCam, go to AVI File tab
|
4:36 |
: Alright, I have a couple more minutes. Fire off any quick hits you have
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4:36 |
Wilmer Flores is Tulo 2.0 right? Just with slightly worst defense. |
4:36 |
: I wanted to have a funny reply to this, but I can’t think of one.
|
4:37 |
Can we expect any columns from you? I’d be interested in seeing you push the theories to their bounds in the abstract, at least. It could be cool! |
4:38 | : Every week! Did you know we have a blog in the library section? Probably not because it’s hidden. Which is something we will probably change |
4:38 |
I’d set up the chats 15 minutes in advance instead of 30, as most FG chats are. I closed the tab instead of leaving it open taking memory for 30 minutes, planning to come back–and forgot until now. |
4:39 |
: Ah, yeah I’ve been starting them earlier because it’s a new one. But that’s a good idea now that they are gaining traction.
|
4:39 |
Does odor get squeezed out of a starting spot in texas next year, with the return of profar? |
4:39 |
: Probably for a little bit.
|
4:40 |
how exactly are IFFB’s handled in WAR. Treated like a strikeout? |
4:41 |
: Yes.
|
4:42 |
the positional adjustment for pitchers seems to be dependant on the pitcher batting runs. the better the pitchers hit the lower the positional adjustment and vice versa. |
4:42 |
: I think it’s based on playing time, like it should be. I’m not seeing a correlation between performance and positional adjustment.
|
4:42 |
If defense gets 7% of the WAR calculation, the -17 run DH adjustment seems kind of high. I mean the DH is still doing a lot of stuff. |
4:44 |
: Why does it seem high? Have to remember there are only 15 DH spots and not 30, too.
|
4:44 |
I wonder how many fewer runs the Nationals would be expected to score over 162 games with today’s lineup–Taylor Espinosa Frandsen Moore Schierholtz Souza Kobernus Leon Treinen–compared to their optimum lineup |
4:44 |
: Okay, hold on. Everyone stay here and give me a second to actually check this.
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4:46 |
: Checking…
|
4:47 |
: Lol what? They are expected to score 2.13 runs per game.
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4:48 |
: They have scored 4.29 runs per game this year
|
4:48 |
: I love post-clinching lineups. That is amazing.
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4:48 |
: I mean, the 2.13 is an estimate, but still. That’s awesome.
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4:49 |
: Alright, I should wrap up. But first…
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4:49 |
: If all goes well, we should have overhauled WAR glossary entries within the next two weeks for hitters and pitchers!
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4:50 |
: So now no one can say “how do you even calculated WAR?”
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4:50 |
: Because I’m going to write many words and equations for you!
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4:50 |
: So, prepare! Take care. Remember to find me on Twitter @NeilWeinberg44
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Neil Weinberg is the Site Educator at FanGraphs and can be found writing enthusiastically about the Detroit Tigers at New English D. Follow and interact with him on Twitter @NeilWeinberg44.
a lot of guys in this chat need to be slapped in the face with a healthy dose of Google.