Maybe There Really Was Something Up With the Ball
Look, I don’t want to dwell on this too much. I’m not sure there’s anywhere to take it, and I’m a natural skeptic with these theories, anyway. I’m not sure why the World Series baseball would feel unusually slick, and, even if it’s true that it did, well, both teams got the same baseballs. You adjust and you deal. The Astros won one more game than the Dodgers did. Every single baseball game is played under its own unique conditions. The Astros are the rightful champions, and the Dodgers are the rightful runners-up.
But there’s always going to be that what-if element. It would be there anyway. What if Clayton Kershaw started Game 7, instead of Yu Darvish? What if Cody Bellinger had actually walked off Game 2? What if Yulieski Gurriel had been suspended immediately, instead of having it delayed until 2018? What if a million things. Baseball seldom makes it clean. What if there truly was something weird about the ball? What could’ve happened if there weren’t?
There’s no closure to be found through entertaining these questions. The games will never be replayed, and the Astros will stand as the 2017 champs forever. I just wonder. I see the argument against the ball being different. I made it just the other day! And yet, I’m not sure how to explain Brad Peacock.
Peacock made the World Series roster. That’s one of those obvious statements that would’ve seemed strange eight or nine months ago. And not only did he make the roster — he pitched in four games. I wouldn’t say he was perfect, but he got 11 big outs in Game 3, and he got six big outs in Game 7. Peacock was one of few pitchers who had the trust of A.J. Hinch, and so he played a major role in the Astros’ title push.
Peacock, this year, was outstandingly good. It’s why he pitched in the playoffs. It’s why he pitched in Game 7. For most of the year, he was a starter, and in the World Series, he was a reliever, but that’s not a mark against Peacock; the Astros simply have too many good starters to start. How effective was Peacock during the regular season? There were 134 different pitchers who threw at least 100 innings. Peacock ranked 10th among them in wOBA allowed, at .274. Dallas Keuchel allowed a wOBA of .273. Rich Hill allowed a wOBA of .280. Peacock was great.
Why was he great? In part, it’s because he was the healthiest he’d been since 2011. And in part, it’s because he leaned on a terrific new slider. He threw it almost 40% of the time. It comes with a fun little origin story.
Peacock primarily was a fastball-changeup-curveball pitcher in 2013-14 for the Astros, but now throws his slider more than 35 percent of the time and has a batting average against of .201, much of that due to the slider.
“I used to have a slider that was really hard and it was getting hit pretty well down there in Triple-A so I was going, ‘I need like a sweeper slider,'” Peacock said. “So (Jordan Jankowski) had a good one on the team and he showed me how he threw it and how he holds it and I just ran with it.”
Peacock learned his slider from Jordan Jankowski. He’s since passed it along to Collin McHugh. You never know what little tweak might make the difference. Peacock got better as a member of the Astros, but it wasn’t exactly the Astros’ organizational doing. He just picked something up from a teammate. Peacock’s slider this year had one of baseball’s higher slider-specific run values. It was comparable to the sliders thrown by Kershaw and Darvish.
None of this was any secret. Every pitcher has his obvious strengths. Every pitcher pitches to his obvious strengths, when the season is on the line. Lance McCullers obviously never shied away from his curveball. Peacock liked his slider, and he leaned on his slider. Then he pitched in last week’s Game 3. Of his 53 pitches, just six were sliders.
All right, that’s one game. One blip. Peacock appeared again in Game 5. Of his 39 pitches, just five were sliders. And then there was Peacock’s Game 7 appearance. Of his 37 pitches, just three were sliders.
Now, granted, one of those sliders was terrific.
For the most part, though, Peacock continued to work off of his fastballs.
Overall, combining Peacock’s last three games, he threw 129 pitches, with only 14 sliders. That’s a rate of about 11%. This is how Peacock’s 2017 season looked, in terms of rate of sliders thrown over rolling 129-pitch averages.
Peacock never threw sliders close to so infrequently. There’s one slight early dip just below 20%, but he put that behind him in a hurry. Peacock spent almost the entire rest of the year over 30%. He did what good pitchers typically do — he made frequent use of his best weapon. And then, in the World Series, he suddenly stopped.
When I examined this slick-ball theory the other day, I found that, overall, pitchers weren’t staying away from their breaking stuff. Just yesterday, Kershaw threw plenty of sliders. Darvish also kept trying to make the slider happen. I find that to be pretty compelling and pretty convincing. But Darvish’s slider in particular was dreadful in the series, almost incapable of missing any bats. The question is going to linger. You could say it’s possible that, in the series, Peacock just didn’t have a feel for his slider, so he didn’t want to use it. Sometimes pitches go through slumps. But *why* might he not have had a feel? Why did Brad Peacock choose the World Series, of all times, to hardly use the pitch that got him on the roster in the first place? It’s not like the Astros were just trying to make the Dodgers confused. It’s not like Brian McCann had McCullers throw way fewer curves. The Peacock point is bizarre.
Maybe it’s nothing at all. Maybe he just had an atypically lively fastball. When you search for anomalies, you can usually find some, and that doesn’t necessarily make them meaningful. It seems a little silly to be thinking about Brad Peacock today, after all that the Astros have accomplished over all of these years. But Peacock is in my head, now. Maybe the World Series baseballs really were unusually slick. Who knows what that could’ve meant for Darvish. Who knows what that could’ve meant for the outcome. Nothing is ever going to be reversed. Nor should it be. And, in the end, credit to Peacock, who played a major role while hardly using the pitch he throws best. I’d like to see Lance McCullers try *that*.
Jeff made Lookout Landing a thing, but he does not still write there about the Mariners. He does write here, sometimes about the Mariners, but usually not.

Now we need to know if slick balls will be used in 2018.
Jeff, did you see the interview where Carlos Beltran told Alex Rodriguez that Darvish was tipping his pitches again in both starts in the WS?
If Darvish was tipping his slider in particular, that would explain it being super ineffective. The slider really depends on looking like a fastball and moving to be effective; if someone knows its a slider, its not nearly as good.
Beltran didn’t admit to it. ARod asked about it, referencing some inside joke from their days together in NY, and Beltran didn’t reply.
For all we know, Beltran saw Darvish tipping. Or Beltran didn’t, and the Astros just capitalized on poorly executed sliders.
I dunno, he basically said that he was tipping the pitches. https://twitter.com/jeffpearlman/status/925962740971192321
That’s more evidence, in addition to the decreased whiffs on sliders, decreased control of sliders, and abandonment of Giles. Both sides were affected. It seems pretty clear that they really were slicker.
The only real question that I can’t answer is why it made Darvish especially vulnerable. Maybe the combination of tipping just eliminated his effectiveness. Still he was so good in the previous 2 series.
It seemed like Darvish tried to not give up on his slider. I haven’t checked his pitch distribution, but visually, he kept going to it almost every at bat. Peacock abandoned his. Giles kept going back to it. Likely just coincidence, but who knows…
For those curious, Darvish threw slider 38% of the time last night, compared to 24% during the regular season. He threw it 29% of the time in his game 3 start.
That seems imprudent. Almost like he wanted to show so much that he was unaffected by the “slick ball” talk that he erred the other way and just kept serving it up when it clearly wasn’t working.
(then again we can spin fitting narratives for many things after the fact.)
This isn’t evidence that the balls were slicker. At best it’s evidence that Peacock believed that the balls were slicker. Which isn’t nothing, but if we’re making a Bayesian inference here, the latter is a lot weaker.
I don’t think we ever really thought there was much of a chance all the pitchers were lying to us, though.
In the end, if it is having any impact on the way the pitchers are pitching, does it really matter if they were slicker, or if the pitchers think they are?
Our thoughts and beliefs have an outsized role in what we believe is reality, as we change our reality with actions that coincide with those thoughts and beliefs.
If I think the ball is slicker, and I alter my approach as if the ball was slicker, the ball might as well be slicker, as it is having the same impact either way.
There are 2 effects, one from actual slickness, one from perception.
Perceived slickness could affect pitch mix. Actual slickness could affect pitch effectiveness.
While we’re trying to make every excuse for the Dodgers losing the Series, maybe we should start giving the Astros credit for winning it with decisions like “Hey, ball is pretty slick, let’s stay away from sliders” while Darvish, Kershaw and Co. continued to throw cement mixers right over the plate.
Who here was saying that this is why the Dodgers lost? The Astros also had to deal with this.
A big part of why the Dodgers lost was that their best hitters weren’t hitting.
Why would this be how you see things
I’m interested in how a slicker ball may have affected fastballs too. There were a lot that seemed to be thrown harder and move more, which makes sense if there is less drag on the ball, I would think.
Do we know who puts the mud on the baseballs for the postseason? I think the home team person puts it on during the regular season, maybe they have some person that sucks at it during the playoffs?
Did Kershaw throw fewer sliders in the games he was most effective in? It’s anecdotal, but it felt like he used his curve more in games 1 and 7 and used the slider more in game 5.
In game 1, he threw 42% sliders. In game 5, he threw 41% sliders. In relief in game 7, he threw 35% sliders.
Source: Brooks Baseball & my calculator.
Thanks friend.
Both teams used the same baseballs and needed to make adjustments, but slicker baseballs would affect a team more if their pitchers rely more on sliders. If a pitcher like Kluber cannot throw his slider effectively, would he still be an ace? Maybe MLB can just move to a tacky ball in 2018 and be done with the mud, pine tar, finger licking, etc.
A tacky ball would be a blister machine.
This is off topic, but could you write an article of if darvish was tipping his pitches? Eduardo Perez was saying that darvish shakes his hand in his glove when it’s a slider but that he doesn’t move his hand when it’s a fastball
this is actually pretty important for splitter pitchers like tanaka. slicker balls seem to help him a lot.
Aren’t all MLB rubbed down with that special mud from Mississippi or something? Maybe someone ran out? lol
I have not followed this discussion much, or at all… but has anyone talked about how the baseballs are rubbed up? If a ball is too slick, then it was not rubbed up enough with mud. It is someone’s job to rub up factory balls to make them less slick. In non-professional baseball, it is the home team’s responsibility to provide, and rub up baseballs. I have had many an umpire complain to me that the balls were too slick – we fixed them. If you don’t believe that this happens, then Google the Dirty Jobs, where there go mud farmin’. Is this not what is being discussed. I apologize that I didn’t have time to read thoroughly past the headline, which is usually a mistake!
Pretty sure Devenski totally abandoned his in Game 5 too. Brooks said he was 100% fastballs and changeups, after being ~25% (if memory serves) sliders during the regular season.
So to recap, in game 5 in particular: Kershaw gets 1 SwStr on a slider (his best pitch) and Peacock and Devenski just abandon theirs.
Something weird was going on, and it was affecting sliders.
Maybe it was also affecting cutters (which would make sense) in light of Jansen?
There are weird variables still, but I’m a believer that SOMETHING was up.
Was Peacock’s fastball velocity up pitching in relief? It’s plausible McCann & crew saw something about his fastball and adjusted, and the dodgers hitters never caught up to force another adjustment.
Not saying it isn’t slicker balls, just that there are other options out there and sadly we’ll probably never know.
there is a video going around showing proof that yu darvish was tipping his pitches…seems that when he first grips a baseball in his glove at beginning if his windup, he starts with a fastball grip…so his hands never move from time he first grips ball, to time he begins windup…but if the pitch called is a slider or breaking ball, he takes that fastball grip he has already started with…and as he moves the baseball to change the grip, you can see his elbow wiggle a bit…so, no elbow wiggle is a fastball…an elbow wiggle could be a curve or a slider, but you know it is not a fastball…also…bregman stole third base in the first inning of game 7 of a world series…no way you even attempt to steal third base there, unless you are sure the pitch is going to be a breaking ball…and with bregman standing on second base, he can easily see darvish’s elbow move…also, i see that rick honeycutt, the pitching coach for the dodgers will not be getting a new contract, and is probably leaving the dodgers…could this be because he couldn’t ‘fix’ darvish? or perhaps maybe he didnt even see darvish was tipping his pitches? in any case…darvish tips pitches in 2 games…astros win both games…and thats in essence why the astros win the world series
I rarely hear stories about the winning pitcher tipping pitches…
Interesting. But to say the stolen base would “never” be tried there unless you know offspeed is coming, that’s overcooked.
First off, stealers went 20-2 off Darvish this year, 84-13 in his 5-year career, and 12-0 in steals of third. And even if an attempt wasn’t advisable with no out, baserunners do quote-unquote “dumb” things all the time — remember Hosmer’s reckless dash home in the 2015 finale?
Details of the game-state right at that moment also reduced my surprise level when Bregman ran:
— Houston ahead by one run. A slim lead is the best time for aggressive baserunning, IMO.
— LA seemed a bit stunned after Bellinger made mental and physical mistakes on the same play. Having a team on its heels early also invites aggression.
— Another rocky start meant Darvish likely had all his thoughts on the batter, with no consideration of the (unlikely) steal possibility. You can steal third on a fastball, if the pitcher ignores you.
— Altuve with an 0-1 count will probably swing if it’s a strike, and likely make contact if he swings.
— Bregman went 3-1 in steals of third this year, which is a fairly high share of his 22 attempts.
I’ll stay out of the technical debate. But anyone trying to link this ball theory to high scoring has a tough job.
First, scoring wasn’t especially high: 4.86 R/G. It was exactly that in 2011; a tad higher in ’09, ’07, ’98; way higher in ’02 and ’97.
And some key batting numbers in this WS were worse than the MLB season rates: .218 BA vs. .255, .725 OPS vs. .750, 22.5% SO vs. 21.6%.
Okay, there was a record-high 25 HRs. But these teams have homered in bunches before; they had the two most prolific HR streaks this year — 41 HRs over 17 games for LA, 38 HRs in 19 games for Houston.
You can line up their regular-season game logs and find at least five distinct 7-game stretches with more HRs and way more runs:
— Team games #69-75: 38 HRs, 7.4 R/G
— Team games #48-54: 29 HRs, 7.3 R/G
— Team games #87-93: 28 HRs, 6.6 R/G
— Team games #106-112: 27 HRs, 5.4 R/G
— Team games #153-159: 26 HRs, 7.4 R/G
And lastly, WS HR% is usually a bit more than the regular season. So, in the context of this extreme HR season, an extreme-HR Series just isn’t enough by itself to support a changed-ball theory.
Everything is tough to prove. This is impossible.
In an interview before Game 7, Darvish said part of his problem in Game 3 was that he warmed up with a regular season ball, and the game ball was slicker, so that caused problems with his slider. He said he would deal with it in Game 7 by gripping it harder. So whether the ball was different or not, it was in his head.
Really, I don’t know how we can even debate whether the ball was different. Every pitcher who said anything about the ball, said it was different except Hill. And he actually never said it wasn’t slicker, he said the size and seams were the same. I have no idea why it would be different. My only theory is the different ink used on the stamps didn’t adhere to the regular ball and needed the surface to be different. That’s probably crazy, but I can’t think of any other reason.