Jacob deGrom’s 2018 will go down in history as one of the best pitching seasons of all time. There’s almost no way it couldn’t — pitchers don’t put up sub-two ERAs very often, and they record sub-2 FIPs even less frequently. By those stats alone, deGrom had the seventh-best ERA and eighth-best FIP since integration. Adjust for the run-scoring environment, and he falls all the way to ninth. Simply put, deGrom was sublime in 2018.

After a season of such historic magnitude, we’d be crazy to not expect regression. Everything broke so well for deGrom in 2018 that he could pitch every bit as well in 2019 and end up with meaningfully worse results. Indeed, ZiPS and Steamer both projected deGrom’s ERA to increase by essentially a run this season. Despite that, both projected him to put up the second-best ERA and FIP among starters, behind only Chris Sale. When you’re as far ahead of the pack as deGrom, you can significantly regress and still be one of the best.

It isn’t just projection systems that peg deGrom to come back to earth — the broad sweep of history suggests it as well. No matter how you slice it, pitchers who record a season like deGrom’s decline the next year. Want to focus on ERA? There have been 26 times since 1947 when a pitcher qualified for the ERA title and had an ERA below two. Excluding 2018 deGrom and 1966 Sandy Koufax (he retired after 1966 and so didn’t have a next season), these pitchers averaged a 1.77 ERA. The next year, they recorded a 2.78 ERA. Read the rest of this entry »

The first week of baseball is a wondrous time to be a baseball fan. It’s also a weird time to be a baseball writer. On one hand, baseball is happening, and that’s a relief after the long dark night of the offseason. On the other hand, not that much baseball has happened, and most of the seemingly noteworthy stories are small-sample noise. Give me an early-season take (Tim Beckham is great! Sandy Alcantara is a top-10 pitcher!), and I’ll likely dismiss it as a fluke. One performance this week, however, made me sit up and take notice. Corbin Burnes struck out 12 batters on Sunday, and the way he did it should have Brewers fans, and baseball fans in general, salivating.

At first glance, Burnes’ start against the Cardinals is a textbook case of not reading too much into a single start. He struck out 12 batters and walked only one, which is obviously incredible. On the other hand, he gave up three home runs and only lasted five innings, producing a what’s-going-on split of a 6.53 FIP and 0.00 xFIP. If I were a betting man, though, I’d wager that the strikeouts are more predictive than the home runs. Why? Corbin Burnes’ fastball was absolutely ludicrous, and in a way that you can’t fake.

Most of the things that happen in a baseball game are contextual. Did a pitcher strike a lot of hitters out? Well, consider who was batting. If it’s a bunch of high schoolers or the 2019 Giants outfield, that’s an extenuating circumstance. Did he give up a lot of home runs? A ton of factors go into that. One thing that isn’t contextual is a pitch’s spin rate. The batter doesn’t influence it. Pitch selection doesn’t influence it. It doesn’t take long to stabilize. It’s basically as clean as it gets in baseball statistics — you throw the ball, and you get your results.

When Burnes threw the ball on Sunday, the results were off the charts. Burnes fired 61 four-seam fastballs on Sunday. His velocity was down a tick or so from last year, when he worked out of the bullpen — nothing unusual about that. His spin, on the other hand, was wholly new. Burnes averaged 2912 rpm, and it’s hard to explain how crazy that is. It was nearly 150 rpm higher than last year’s league leader in average spin rate, Luke Bard. The fastball that Burnes spun most slowly, at 2660 rpm, would have been good for the second-highest fastball spin rate in baseball last year.

Burnes has always been a high-spin pitcher (11th in baseball among pitchers who threw at least 100 fastballs in 2018), but this is an entirely different level. Spin rates vary from start to start, but not like this. In fact, Burnes made thirty appearances last year, and the gap between the highest spin rate he recorded and the lowest was 270 rpm. Sunday’s start was 200 rpm faster than last year’s highest rate. Graphically, that looks pretty absurd, like so:

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Here’s something that won’t surprise you. The number one starter in all of baseball last year, when it came to getting batters to chase pitches outside the strike zone, was Patrick Corbin. Of course it was Patrick Corbin! Dude threw 95% sliders last year, and that’s only a little bit of an exaggeration (it was a little over 41%, if you’re intent on checking my math). The second guy on the list, a minuscule 0.1% of out-of-zone swing rate behind Corbin, was Jacob deGrom. I mean … yeah. DeGrom had a 1.7 ERA last year and struck out 32% of the batters he faced. People swung at a lot of pitches outside the strike zone.

At number three, though, the list takes an unexpected turn. The third-highest chase rate in baseball last year belonged to Miles Mikolas, and it’s hard to think of a pitcher who resembles Corbin and deGrom less than Mikolas does. While the aforementioned duo both had top-10 strikeout rates among qualified starters, Mikolas was in the bottom ten. Corbin and deGrom were exemplars of the new three-true-outcome direction baseball has taken (mostly one true outcome, in their case), while Mikolas had essentially the lowest three true outcome rate in all of baseball. What does it mean to generate a ton of swings outside the strike zone but few strikeouts?

Making sense of how Miles Mikolas operates is difficult. He’s kind of a unicorn — you probably think you can name pitchers like him, but none of them fit. Is he Kyle Hendricks, the pinpoint control artist with a preposterous changeup? Mikolas doesn’t even throw a changeup. He also sits around 94.5mph with his fastball, top 20 among qualified starters in 2018. Hendricks has the slowest fastball in that group. Is he a rich man’s Mike Leake, perplexingly effective despite never striking anyone out? That’s not it either — Leake never generates swings and misses, and never is barely an exaggeration here. He’s had a bottom-10 swinging strike rate every year he’s been a qualifying pitcher. Mikolas, meanwhile, is around league average. Leake also, somehow, throws significantly fewer strikes than Mikolas — Mikolas put the ball in the strike zone a league-leading 48% of the time last year. Read the rest of this entry »

As you’ve no doubt heard, we’re living in a golden age for position players pitching. Don’t believe me? Read the copious articles written about it in the past few years. At this point, you know the broad strokes of the genre. You know that position players are pitching a lot more often these days. You know that it’s funny because they’re not that good at pitching, but also funny because they’re not as bad as you’d think.

It’s gotten so common, so normal, that less than a week into the 2019 season, we’ve already had a game where position players pitched on both sides. That game had a little bit of everything: John Ryan Murphy was terrible, allowing seven runs in two innings. Russell Martin was perplexingly effective, setting the side down in order in his one inning of work to close out the Dodgers 18-5 win over the Diamondbacks. He was the first full-time position player to close out the ninth inning of a game since 1963.

There was one thing missing from that game, though — neither “pitcher” recorded a strikeout, and strikeouts have been, in my opinion, criminally under-reported in all the coverage of position-player pitchers. Those embarrassing-but-not-that-embarrassing pitching lines? They were compiled against real, honest-to-god major league hitters (and also occasionally pitchers pretending to be major league batters). We all know that position players pitch well enough to occasionally get strikeouts, and that’s a pretty great fact. Take a minute, though, to consider this: the pseudo-pitcher’s small triumph is also the batter’s great failure. He just struck out, the most miserable feeling in baseball, and he did it against a guy who’s out there goofing around.

In 2018, position-player pitchers struck out 22 batters. On the one hand, that doesn’t sound like a lot, but on the other hand — that’s a lot! Still, though, not all of these strikeouts were created equal. There’s a lot of distance between Gerrit Cole striking out against a utility infielder and Eugenio Suarez going down on strikes against a backup catcher. I wanted to chronicle this, because in a year there might be too many strikeouts for it to be interesting or too few to devote an article to. I sat down and watched all 22 strikeouts and separated them into tiers of embarrassment. These guys might be multi-millionaires. They might be unfathomably strong and coordinated baseball machines, but sometimes they mess up the easiest tasks. They’re just like us. Who couldn’t relate to that?
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After Manny Machado and Bryce Harper signed their gargantuan free agent deals, dominos began to fall left and right across baseball — if you’re of sound body and mind, you probably recently signed a multi-year extension with a major league franchise. When a star signs a new contract of any type, articles analyzing the contract’s value are never far behind, and this recent extension spree has been no exception. I wanted to get in on the action, but the analysis has already been done for the most part. Search for a player who recently signed a contract, and you’ll find FanGraphs analysis of it, likely with some dollars-per-WAR analysis. Chris Sale? Jay Jaffe’s got you. Kiley McDaniel covered Eloy Jimenez’s extension. Justin Verlander? Jaffe again. You get the idea. Craig Edwards even wrote about Harper vs. Machado in an exhaustive level of depth, down to figuring out state taxes.

What’s an author to do? Well, there’s one angle that hasn’t been covered for a while, believe it or not. More accurately, it’s been covered by a combination of shrugs and mathematical hand waves: the value of the opt-out in Machado’s (and Nolan Arenado’s) contract. The reason these haven’t been sufficiently covered is simple — they’re difficult to value. If we want to figure out how many wins a player projects for, a methodology exists for that exercise. Sprinkle in a little of the aging curve and the dollar value of the contract, and there’s one level of analysis. If you want to put everything in present-day dollars, it’s just more arithmetic, but the basic shape remains similar. Introducing opt-outs, however, is a step in a wholly different direction.
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If you watch enough baseball, players start to blend together in your brain. You know what I’m talking about — Corey Seager is injury-prone Carlos Correa. Ozzie Albies is caffeinated Jose Altuve (no small feat, since Altuve is a Five Hour Energy spokesperson). Newly minted $100 million man Alex Bregman is Anthony Rendon with good hair. The Bregman/Rendon comparison occurred to me even before I saw Bregman play. A highly-drafted college third baseman with an excellent all-around game? More power than you’d think despite a swing that seems designed to put the ball in play? Probably a little better at baserunning than you’d expect, even if he isn’t a burner? Yeah, that pretty much covers both guys.

Nothing Bregman has done since reaching the majors has changed this early comparison in my mind. Between 2017 (Bregman’s first full year in the bigs) and 2018, he’s recorded a 141 wRC+ to Rendon’s 140. Bregman has walked 11.3% of the time, Rendon 11.6%. Bregman has struck out 13.7% of the time to Rendon’s 13.6%. Bregman has a .219 ISO; Rendon’s is .230. Bregman has 50 home runs; Rendon has 49.

You get the general idea — both players have been incredible, and both have done it in really similar ways. Rendon has been worth 13 WAR over the past two years, second-best among third basemen. Bregman has been worth 11.1 WAR, good for fourth. Here’s another thing they have in common — they were both among the most extreme swing-rate changers from 2017 to 2018. Plot twist, though! It was in opposite directions. Bregman decreased his swing rate by the third-most among qualified hitters, while Rendon increased his by the second-most. Yes, we’ve finally found a place where Anthony Rendon and Alex Bregman are different — extremely different.

For Alex Bregman, 2017 must have been a mix of satisfaction and frustration. His 217 PA in 2016 exhausted his rookie eligibility, and while he held his own in his first big league action (114 wRC+), he looked very much like someone struggling to adjust to big league pitching. He struck out in 24% of his plate appearances, light years higher than his 10% career minor league rate (and 7.5% college rate). His swinging strike rate was 11.8%, meaningfully above league average. In short, he didn’t look like the hitter scouts expected him to be. Read the rest of this entry »

It’s not a news flash that Juan Soto was great in 2018. The simplest of statistics could tell that story. His OBP started with a 4. His slugging percentage started with a 5. He had 22 homers in a mere 116 games. However, the real hype starts when you dig into the numbers a little more. Juan Soto was 19, and he walked 16% of the time in the big leagues while putting up a 146 wRC+. People are making historical comparisons because that’s the only way to appreciate such a tremendous feat. No one in history has put up a better batting line before their 20th birthday, and the only people to come close are Mel Ott, Tony Conigliaro, and Ty Cobb. When you put it that way, maybe we’re underselling how great Soto’s 2018 was.

I’m not writing today to remind you of how good Soto’s 2018 was (like, really good though! Really good!). Instead, let’s talk about the approach he used to generate those numbers. Here’s a leaderboard of the 10 best hitters in baseball by wOBA last year, minimum of 450 PA. I’m using wOBA instead of wRC+ for compatibility with data further along in the article:

Well, that’s about what you’d expect. Ten great hitters, or potentially nine great hitters and Max Muncy, depending on how you feel about him. Paul Goldschmidt was eleventh if you want to leave Muncy out of this. That alone is already amazing. What makes it really impressive, however, is that Soto did it all against fastballs. I’m going to throw another leaderboard at you. Read the rest of this entry »

Photo: Keith Allison

Before the 2017 season, Aroldis Chapman signed a near-record-setting contract to play for the Yankees. The club knew what they were getting, both on and off the field — they had traded Chapman to the Cubs earlier that year, and now they were bringing him back. More broadly, baseball knew what the Yankees were getting — a dominant closer with a dominant fastball. Just how much of an outlier was Chapman’s fastball? Well, when MLB created a fastest pitches leaderboard to show off Statcast, they added a button called the “Chapman filter.” In 2016, Chapman threw the thirty fastest pitches in the majors. It’s not much fun looking at a leaderboard that’s just one guy’s name over and over again.

Fast forward a year, and all the signs were trending downward. Chapman put up a 3.22 ERA and a 2.56 FIP in 2017, both the highest marks since his rookie year. He struck out a career-low 32.9% of the batters he faced (which is still pretty good for a career-low). His average fastball velocity declined by a mile an hour. By early 2018, he’d even been dethroned atop the fastest pitch leaderboard by Jordan Hicks. The human brain is an amazing pattern-matching machine, and we’ve seen this one plenty of times. Closers often break — it’s one of the reasons Chapman’s five-year contract was considered a risk when he signed it. The king has his reign, and then he dies. It’s natural.

Well, a funny thing happened on the way to irrelevance. Aroldis Chapman reinvented himself in 2018, and while he didn’t quite get back to his game-breaking 2014 highs, he recorded a 2.45 ERA and an even more absurd 2.09 FIP. He struck out 43.9% of the batters he faced, the second-highest rate of his career. How did he do it? Did he reach back a little further and take the velocity lead back from Hicks? Not even close, as his average fastball velocity declined another tick in 2018, and he finished a distant third in that category, the first time he wasn’t the hardest thrower in baseball since 2011. Instead, he leaned on his slider — one that may be the best in the game today. Read the rest of this entry »