Pitchers learn and develop different pitches, and they do so at varying stages of their lives. It might be a curveball in high school, a cutter in college, or a changeup in A-ball. Sometimes the addition or refinement is a natural progression — graduating from Pitching 101 to advanced course work — and often it’s a matter of necessity. In order to get hitters out as the quality of competition improves, a pitcher needs to optimize his repertoire.

In this installment of the series, we’ll hear from three pitchers — Chance Adams, Domingo German, and Nick Pivetta — on how they learned and developed their curveballs.

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Chance Adams, New York Yankees

“When I was in college my pitching coach was Wes Johnson, who is now with the Twins. He taught me my curve. For awhile it was kind of slurve-slider, then it went to a curveball, and now it’s kind of slurvy again. But it’s interesting, because when I got [to Dallas Baptist University] it was, ‘OK, I throw it like this,’ and he was like, ‘Well, have you tried spiking it?’ My curve was moving, but it wasn’t sharp, and I was like, ‘No, not really.’ Spiking it was uncomfortable at first, but after I got used to it, it was pretty interesting. It started moving better.

“My pointer finger is off the seam, with just a little pressure on the ball. Wes said to try spiking it and see what feels good, so I worked on it with this much spike, that much spike. Even now, the spike kind of varies for me; I’ll move it back or forward for comfortability, but also movement-wise. Sometimes it’s sharper when it’s more spiked. It kind of depends on the day, and if I’m controlling it or not. Read the rest of this entry »

At the end of August, the Philadelphia Inquirer suggested that Mets rookie sensation Pete Alonso and Phillies first baseman Rhys Hoskins could be the next generation’s greatest player rivalry in the NL East. At that point, Alonso was slugging a hundred points higher than Hoskins and had almost 20 more home runs on the season. Unlike Alonso, Hoskins regularly slips away from the Phillies lineup, disappearing for weeks at a time: There’s streaky, there’s bad luck, and then there’s hitting under .230 in the clean-up spot for three months.

Meanwhile, Alonso broke the Mets’ single-season home run record on the first pitch he saw against Yu Darvish on August 27. If all Alonso had done was break the record, the only history we’d have to mention is from the recent past: Carlos Beltran and Todd Hundley held the previous Mets record, 41, having set it in 2006 and 1996, respectively. But because of Alonso’s rookie status, his accomplishment is made even more distinct.

You only get one season to set rookie records — or set records as a rookie — and through that slim window, Alonso has slipped his 6-foot-3, 245-pound frame. This is due in part to his classification by baseball scientists as a “pure hitter.” Determining what is meant by this term usually leads to a loudly shouted or frantically typed mention of historic figures like Ted Williams or Joe DiMaggio. The eyes of baseball puritans light up when talk begins of Alonso “pure-hitting” like sluggers did back in the good old days, when pure-hitting was America’s pastime, along with losing everything on the stock market and the rampant abuse of benzedrine.

Anyone who has swung a bat can tell you what a pure hit feels like: when timing, mechanics, and strength align to allow the barrel of the bat to connect with the sweet spot of the ball. But being a pure hitter means doing all that more than once. To make the impression of a Pete Alonso, you’ve got to keep doing it within the span of one season — your first season facing big-league pitching. Alonso is doing just that, and you have to go back pretty far to the find the last guy who did: Johnny Rizzo, in 1938 for the Pirates — a man who gives us a historical post to which we can tie Alonso’s accomplishments, while also viewing them through the filter of… well, being on the Mets. Read the rest of this entry »

After frittering away what was once an 11 1/2-game lead over the Indians, the Twins have reestablished firm control of the AL Central race, but this weekend, their hopes to play deep into October took a hit when Michael Pineda was suspended for 60 games for violating MLB’s Joint Drug Prevention and Treatment Program. Pineda tested positive for hydrochlorothiazide, a diuretic on the league’s banned substances list, and while his suspension was reduced from the standard 80 games upon appeal, he won’t be available for the playoffs, making this one of the most impactful recent Joint Drug suspensions.

Pineda’s suspension was announced amid a three-game series between the division rivals. On Friday night, he held the Indians to one run over six innings while striking out a season-high 10; he left the game carrying a 2-1 lead, but the Indians tied the game in the eighth and won 6-2 in 11 innings. The next day, MLB announced the suspension, and while a fired-up Twins team rallied late to win 5-3 and cut the team’s magic number to clinch the division to 14, they lost the rubber match on Sunday, 5-2.

In a statement released by the Major League Baseball Players Association, 30-year-old Pineda said in part:

“I mistakenly took a medication that was given to me by a close acquaintance, who obtained it over-the-counter and assured me it would safely help me manage my weight. I ingested a few of these pills without the consent of the Twins’ training staff. Testing revealed trace elements of a substance called Hydrochlorothiazide, which is a banned diuretic under baseball’s testing program.”

Hydrochlorothiazide is a medication used to treat high blood pressure and fluid retention (edema) by producing more urine, which helps the body get rid of excess sodium and water. It’s on the list of banned substances because it is often abused as a masking agent, which helps to to conceal the use of anabolic steroids by reducing their concentration in urine due to the increase in volume. Read the rest of this entry »

The Red Sox parting ways with Dave Dombrowski — last night’s announcement came at the bewitching hour — is somewhat surprising. Then again, it really isn’t. Questions about his future have been circulating for a few months, and while a death knell has yet to sound on Boston’s season, any hopes of a postseason berth are now on life support. Last October is but a memory, and as the saying goes, “What have you done for me lately?”

To say it’s been a disappointing season for the defending World Series champions would be an understatement. But that’s only part of the reason Dombrowski, the team’s president of baseball operations since August 2015, was let go. What matters is the future, and much as when Ben Cherington was jettisoned four years ago, the time had come for new leadership. For now, assistant GMs Brian O’Halloran, Eddie Romero Jr., and Zack Scott, along with Senior Vice President Raquel Ferreira, are expected to fill that role on an interim basis.

The extent to which Dombrowski and Red Sox ownership were no longer on the same page is unknown as of this moment. More may be learned when the involved parties address the media (though the team has elected not to hold a press conference regarding the decision), but even then questions will remain unanswered. In all likelihood, we’ll be left to speculate as to whether loggerheads had been reached with the important near-term personnel decisions that will shape the team’s future. Based on his track record, Dombrowski would presumably be averse to anything resembling a rebuild, while his two predecessors — Cherington and Theo Epstein — placed a high premium on player development and building from within. That divergence is reflected in Boston’s farm system rankings; the Red Sox system is currently dead last. Read the rest of this entry »

12:01

Jay Jaffe: Hello and good afternoon! Welcome to my first chat in this new time slot — real life events (mainly my daughter starting preschool) have necessitated changing from my Thursday slot, and thankfully, Dan Szymborski was able to accommodate. You’ll still get the same artisanal blend of sense and nonsense as I usually dish out.

12:02

Jay Jaffe: I’ve got a thing in the pipeline today about Michael Pineda’s suspension and its impact on the Twins. And now, onto the questions…

12:03

Jay Jaffe: That is a particularly weak move as it leaves Alex Cora and the players to answer questions without knowing all that went into the decision or what the future holds

12:04

Jay Jaffe: Well, I suspect that J.D. Martinez will opt out and that the Sox might decide that their chances of re-signing Betts are better if they haven’t committed $100M+ to him. Beyond that… they’re going to have to get creative and hope that some of their young players pan out.

Read the rest of this entry »

“I don’t do anything with my life except romanticize and decay with indecision.” – Allen Ginsberg

There’s no team harder for me to get a read on than the Kansas City Royals. The afterglow of the 2015 World Series has long faded, and attendance is falling back towards levels you might expect for a baseball team playing in Florida. Given the team’s inconsistent statements concerning the organization’s present — and the accompanying moves in harmony with that theme — I’m not sure whether Kansas City is incompetently rebuilding, incompetently retooling, or incompetently competing. Short of a sudden change in organizational focus, the Royals’ main task is to mark the time between the end of one Pat Mahomes season and the start of the next one.

The Setup

After two years of treading water post-championship, 2018 was the year that everything came crashing down. That that season was going to be a dreadful one was largely preordained, prophesied by the team’s contract situations. After winning 80 games in 2017, players worth more than half of the team’s WAR (13.0 wins out of 24.7 total) hit free agency, and there was little hope of one of the league’s weakest farm systems or a fat ownership wallet making good on those losses. Mike Moustakas returned to Kansas City after receiving scant interest in free agency and Alcides Escobar was re-signed for no fathomable reason, but there was little reason to believe that these moves were enough to keep the team wild card pretenders into August.

The 2018 Royals finished with 104 losses and it seemed as if they were finally ready to embrace a full-blown rebuilding process. After all, the Royals spent the summer trading most of their veterans who could fetch some kind of player in return; Moustakas, Kelvin Herrera, Jon Jay, Lucas Duda, and Drew Butera were all dealt. A rebuilding team hardly needs a dedicated pinch-runner and Terrance Gore was traded to the Cubs. Even Escobar started to have his playing time curtailed in just his third consecutive year of near replacement-level production. Sure, players like Alex Gordon and Ian Kennedy stayed put, but they were largely immovable anyway. Read the rest of this entry »

For the most part, a pitcher’s FIP is going to line up pretty well with his ERA over the course of a season or a career. There are 240 starting pitchers with at least 1,000 innings over the last 25 years and all but seven of them have a FIP within half a run of their ERA. Even over the course of an individual season, we typically see most pitchers with an ERA and a FIP around the same mark. Over the last 25 seasons covering more than 3,500 individual pitching seasons of at least 100 innings, the r-squared is .61. This season, there are over 100 pitchers with at least 100 innings; the graph below shows their FIPs and ERAs (all stats are through September 5):

With the exception of Antonio Senzatela way up top, we see a pretty distinct pattern moving up and to the right. Within this cluster of players, there isn’t a perfect relationship. A perfect relationship would make one of the stats duplicative and useless. ERA and FIP both measure results on the field, with ERA accounting for the players who cross home plate after getting on base when the pitcher was on the mound (and the trip home wasn’t made possible by an error), while FIP measures strikeouts, walks, and homers. Every year, a good number of pitchers have an ERA higher than their FIP and vice versa. As far as explaining the difference between the two numbers using readily available statistics goes, BABIP and left-on-base percentage explain much of the gap between the two numbers.

That LOB% would explain some of the gap makes a lot of sense given that stranding more runners than expected is going to keep a pitcher’s runs allowed (ERA) lower than his general performance (FIP). We can see the relationship between ERA-FIP and LOB% for pitchers this season below:

Without delving into whether there’s a skill involved in stranding runners (though better pitchers tend to have higher LOB% due to just being better at getting outs generally), we can see that the more runners stranded and the higher the LOB%, the more likely it is that a pitcher’s ERA is going to be lower than his FIP. The relationship over the past 25 years for individual seasons is stronger than the one above, with an r-squared of .56, but even over just one season, the pattern is apparent. What we are dealing with above is sequencing and what happens when runners are on base compared to overall performance. Generally speaking, pitcher’s perform similarly with runners on base and with the bases empty, with a slight increase in FIP for everyone with runners on base:

This isn’t to say that some pitchers aren’t worse pitching from the stretch, or that some pitchers don’t change their strategy to more effectively get batters out with runners on base. But generally speaking, pitchers perform a little bit worse with runners on base, though in a fairly uniform pattern as seen in the graph above. Unless you are Doug Davis, Scott Kazmir, Jeff Suppan, or Iván Nova, then with runners on base, you were within half a run with runners on base or worse.

We’ll get back to LOB% in a minute, but first, we should address BABIP. Here’s the relationship between BABIP and the difference between ERA and FIP:

The relationship isn’t as strong as LOB%, but with an r-squared of .41 this season, we can still see a pattern. Over 25 years of individual seasons, the r-squared is .52, nearly the same as LOB% over the same time. While we know that pitchers exert some control over the quality of their contact, over 90% of pitchers with at least 1,000 innings since 1995 are between .270 and .310, and 65% of pitchers are between .285 and .305 (around 10 hits per year at the edges), so even at the extremes we are talking about maybe three or four extra hits per month. That’s not nothing, but over long stretches of time, we generally see the seasonal outliers get closer to their peers.

As for just how much BABIP and LOB% capture the difference between ERA and FIP, the answer is they account for the great majority of it. I took all individual seasons from 1995 through last season and ran them through a multiple regression calculator to come up with a formula for predicting the difference between ERA and FIP. The r-squared for the formula for the 3,400 seasons was .75, so BABIP and LOB% are doing a huge amount of the heavy lifting when it comes to explaining the difference between ERA and FIP. I put the same formula into this year’s numbers and this is how they came out:

We still see some outliers, but overall, the formula did a very good job predicting the difference between ERA and FIP using LOB% and BABIP. There are a few outliers. Dakota Hudson jumps out, but his larger ERA-FIP discrepancy is pretty easily explained by 15 unearned runs. If he had a more normal five earned runs, the difference would be under a run and he’d be in the big group with everybody else. Justin Verlander, on the other hand, appears to be breaking the formula entirely. To see how, here are 3,500-plus individual pitcher seasons with over 100 innings since 1995, and their LOB% and BABIP:

Quite simply, Verlander is having one of the most unusual seasons we’ve ever seen, with the highest LOB% and lowest BABIP in the last 100 years in the same season. As we can see above, there is some correlation between LOB% and BABIP, with an r-squared of .2, but that’s not as strong as either statistic’s relationship with FIP-ERA, and a pitcher’s BABIP’s relationship with his team’s BABIP is around the same strength, with team BABIP and team UZR having a slightly stronger relationship.

While there is certainly a case to be made that pitchers have control over the quality of contact they yield to some extent — no one would deny the existence of groundball pitchers or fly ball pitchers — BABIP doesn’t even necessarily measure contact quality. It counts every batted ball in the park as either a hit or an out, doesn’t include homers at all, and it varies greatly from year to year. Even xwOBA, which includes homers and dials in on the quality of contact, has difficulty finding a relationship year over year on contact. Looking just at in-season results, wOBA on contact has a difficult time becoming reliable.

It’s only natural to want to find a reason why a pitcher’s ERA and FIP are so different, and for that reason to be related to something the pitcher is or isn’t doing. Unfortunately, that isn’t always likely to be the case. In any single season, there are going to be outliers due to the relatively small sample of plate appearances we are dealing with, and almost all of the difference between ERA and FIP can be explained by BABIP and LOB%. While not all of a pitcher’s BABIP and LOB% are due to a pitcher’s defense, sequencing luck, and just general good fortune, a decent amount is just that. Baseball is a team sport and defenses play a large role in run prevention. While it isn’t always easy to admit, luck plays a role as well.

Ben Lindbergh and Sam Miller banter about Michael Lorenzen, Shohei Ohtani, and two-way terminology, marvel at Eugenio Suárez and other surprises from the 2019 home run leaderboard, celebrate the AL wild card race, salute the improving A’s and Rays, and discuss teams that are reshaping their potential playoff rosters late in the regular season, respond at length to the breaking news that the Red Sox have fired president of baseball operations Dave Dombrowski less than a year after winning the World Series, and then play a Cy Young award game and analyze the legacy of Justin Verlander.

Audio intro: Ben Folds, "Fired"
Audio outro: Midnight Oil, "Short Memory"

Link to story on Mitch Garver’s reinvention
Link to Ken Rosenthal’s speculation about Dombrowski
Link to Alex Speier’s book Homegrown
Link to Ben on Boston’s post-championship complacency
Link to Passan report on Dombrowski
Link to Baumann on Verlander
Link to FiveThirtyEight article on Verlander
Link to Craig Edwards on Verlander’s home run rate
Link to order The MVP Machine

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In terms of notoriety, Nestor Cortes Jr. barely registers a blip on the national radar. That’s not meant as a slight to the 24-year-old lefty. It’s just that when you play for a star-studded team — in baseball’s largest market, no less — it’s hard to make a name for yourself as a rookie reliever. More specifically, a soft-tossing rookie reliever who lasted until the 36th round of the 2013 draft.

He’s probably the most unique member of the 2019 New York Yankees. Born in Surgidero de Batabano, Cuba, and raised in Hialeah, Florida, Cortes has a little Luis Tiant in his windup — Oliver Perez would be a contemporary comp — and his lack of giddy-up is more of a wrinkle than a scar. He’s averaging better than a strikeout per inning with a heater that lives south of 90.

“I’m more of a deception pitcher,” said Cortes, whose 5.13 ERA is accompanied by an unblemished 5-0 record. “The cliche is that everybody throws 95 now, but what I do is try to mess up timing. The multiple windups I use, the spin rate on my fastball, hiding the ball well before I go to home plate… I try to abide by all of that. I cherish that I can use those things to my advantage.”

Those attributes are on display in The Bronx because the Orioles opted not to keep him. Cortes was a Rule 5 pick by Baltimore in December 2017, but after appearing in just four games last April he was returned to his original club. He spent the remainder of the season in Triple-A with the Scranton/Wilkes-Barre RoughRiders. Read the rest of this entry »