Through 18 starts and 111.1 innings pitched, Zack Greinke has compiled a 3.64 ERA. To say those figures play at the top of a major league starting rotation would be an understatement. The mere fact that Greinke remains a good pitcher at the age of 37 in his 18th season is an accomplishment in itself. Arriving in Kansas City as a 20-year-old, just two years after being drafted sixth overall out of high school, Greinke has put together quite the career, accumulating 64.2 WAR (which ranks 42nd all-time and third among active players), winning a Cy Young Award in 2009, and finishing in the top-10 of Cy Young voting on four other occasions (’13, ’14, ’15, and ’17). His Cy Young campaign was 12 years ago and he is still an important cog on a club with World Series aspirations, a testament to Greinke’s greatness and longevity. And that’s to say nothing of what he has battled to become and remain one of the best pitchers in the sport for over a decade.

I prefaced this piece with a brief rundown of Greinke’s amazing career because I am going to be throwing up some red flags in regards to his performance thus far. Despite the excellent ERA I referenced to start, his strikeout rate is down to 18.5% (league average is 23.8%) after posting a rate of 24.5% in 2020 and 23.7% from when he signed in Arizona in 2016 through last season. His walk rate is up to 5%, still almost half the league average of about 9% but an increase compared to his 3.7% and 3.3% walk rates in 2019 and ’20, respectively. Greinke is inducing fewer groundballs than in any season since his Cy Young Award-winning 2009. From 2010-19, he allowed a groundball rate of 46.8%. In 2020, that plummeted to 41.2% and this year he is down to 40.9%. That means 59.1% of the contact he has allowed has been in the air. He has maintained his ERA with the help of a below-average HR/FB ratio and a HR/9 rate about 9% less than the rest of the league. His FIP remains at a solid 4.07, buoyed by his aforementioned home run fortune. Regress that HR/FB ratio towards league average and you get an xFIP of 4.14. Put a little more emphasis on his strikeout struggles and the types of batted balls allowed and you get a SIERA of 4.39, which is a tad less than 8% worse than league average.

So what gives? In his last four seasons, aging curve be damned, he has thrown 3.68 SIERA ball over a not insignificant sample of 685.2 innings, which placed him third in the majors behind only Jacob deGrom (690.1) and Gerrit Cole (688.2). Obviously Greinke is at the point in his career where we expect degradation in his performance, but this dip in his peripherals seems noteworthy given all his success, both in terms of surface-level numbers and those under-the-hood, in recent vintage. Read the rest of this entry »

In late June and in just his fourth major league start, Marlins right-hander Zach Thompson accomplished something that has only been done nine times in the last decade. Facing the Nationals, he went six innings, allowed just two runs (one earned), and struck out 11. In the process, he became the 10th pitcher in the last 10 seasons to strike out 11 or more batters in his first four career appearances — certainly a qualifier-heavy fact, but it still yields quite an impressive list of names:

As the table shows, it’s rare to break into the major leagues with the level of dominance that Thompson displayed, but his path here has been even more fascinating.

In perhaps the most innocuous of moves, the Marlins signed Thompson last November as a minor league free agent to serve as additional bullpen depth. Even still, he was one of the team’s top targets on the minor league free-agent market, Marlins director of pro scouting Hadi Raad told Christina De Nicola of MLB.com, in what he said was based on a blend of scouting and analytics. As Marlins manager Don Mattingly told De Nicola after Thompson’s start against the Nationals, “It’s like, ‘How does this guy get away from teams?’ I liked his stuff, but you never know where that goes, too, after spring training. Sometimes those guys go to Triple-A and you never see them again. Zach, I think, started a little slow, and then kind of got it going. He’s been impressive, so hopefully this just keeps going.” Read the rest of this entry »

A pivotal series between the two teams atop the AL West kicked off on Tuesday with the Astros beating the A’s to extend their division lead to 4.5 games. It was an unusually shaky start from Chris Bassitt, who allowed six runs and couldn’t escape the fifth inning, but he turned the game over to Oakland’s bullpen with the game knotted at six runs apiece. The combo of J.B. Wendelken and Yusmeiro Petit, though, quickly changed that, allowing two runs in the sixth to put the A’s behind for good.

The A’s have routinely found ways to create value despite a small piggy bank, but the bullpen is probably the biggest concern with the team so far. That’s nothing unusual; most teams in the majors stress over their bullpen. But the A’s are not an ordinary team. During their current three-year streak of going to the playoffs, their bullpen has ranked in the top 10 in WAR each of those seasons and top five overall:

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The White Sox have spent the past two months atop the American League Central despite a lineup that’s been nothing close to whole. On a more or less monthly basis, the team has lost a key member of its starting lineup to the Injured List, beginning with left fielder Eloy Jiménez, who ruptured his left pectoral tendon just before Opening Day, and followed by center fielder Luis Robert, who strained his right hip flexor in early May, and then second baseman Nick Madrigal, who tore a pair of hamstring tendons in early June. Now they’ll be without Yasmani Grandal for at least the next four to six weeks, as the switch-hitting catcher tore a tendon in his left knee.

Grandal was already banged up, having departed last Friday’s game in the middle of the fifth inning due to tightness in his left calf. He didn’t play again until Monday. While batting in the sixth inning against the Twins’ Caleb Thielbar, his left knee buckled as he checked his swing on a high 0-2 fastball. He hobbled out of the batter’s box and was soon rolling on the grass in apparent agony, pounding his fists on the ground before being tended to by the White Sox’s head athletic trainer, James Kruk. Initial hopes that he had merely suffered a cramp were doused by manager Tony LaRussa, who in his postgame comments said that Grandal was on crutches in the clubhouse.

The White Sox called the injury a calf strain at the time, but on Tuesday, Grandal was diagnosed with a torn tendon. “I just think it was the twist he made as he made his swing,” La Russa told reporters. “Something got caught. It didn’t free up. You make a turn on it and it got caught and something popped.” The manager said that Grandal would return to Chicago to get a more complete diagnosis. [Update: Shortly after this was published, the White Sox announced that Grandal underwent surgery to repair the torn tendon, and that they will provide an updated timeline, though doctors “continue to expect Grandal to return during the 2021 regular season.”] Read the rest of this entry »

With just a week until the All-Star break, the Mariners have played their way into the thick of the AL Wild Card race, though our Playoff Odds remain skeptical. Based on their pre-season projections, you might expect their surprising success to be linked to two of their top prospects having made their debuts in mid-May. You’d be partially right. While Jarred Kelenic’s big league career hit a major hiccup, Logan Gilbert has been a solid addition to the Mariners’ beleaguered starting rotation.

Gilbert has made nine starts in the majors so far and has compiled a 4.10 ERA backed by an impressive 3.50 FIP. In an ideal world, the Mariners probably would have liked to see Gilbert develop a bit longer in Triple-A earlier this season, but a bunch of injuries to their rotation forced their hand a bit. James Paxton, Nick Margevicius, and Ljay Newsome are all out for the season. Marco Gonzales missed time with a strained forearm. Justin Dunn has been sidelined recently with some recurring shoulder issues. Yusei Kikuchi has pitched extremely well, and deservedly earned the team’s only spot on the American League All-Star roster, but behind him, the rotation has been rather thin. Gilbert’s success at the highest level stabilized that group at a critical point as they began making their way up the standings. With just over 40 innings pitched under his belt, we now have an adequate amount of data to start comparing his minor-league scouting report to his major league results. Read the rest of this entry »

You’re not as good at your job as Jacob deGrom is at his. That’s no knock on you — I don’t even know who you are, much less have access to your performance reviews or job history. But deGrom is one of the very best, in all of history, at the thing he does. I’m sure you’re a great accountant or whatever, but you just don’t stack up.

There’s good news, though. As it turns out, deGrom is actually relatable at times. Last Thursday, deGrom came into the office and had an absolutely miserable hour of work. He got smacked around the park and gave up three runs before recording three outs. And if one of the best of all time at a job can have an off day, then anyone can.

What does a deGrom off day look like? Like anyone’s, kind of. It starts with being a little sloppy, making a silly mistake that you know, even as you make it, isn’t right. For example, don’t leave a fastball, the second pitch of the game, here:

That’s not where pitches are supposed to go. It was a 100 mph fastball, but middle-middle is still not a good look, and Ehire Adrianza laced it past Dominic Smith and into the corner for a leadoff triple. Two pitches in, nothing was going right for the best pitcher in the game. Read the rest of this entry »

MLB passed the halfway mark of the 2021 season over the long holiday weekend, providing a convenient spot to take a break, look back over the preseason projections, and hopefully not cringe too much about how the predictions are shaking out. Since this is the big midseason update, I used the full-fat ZiPS model for individual players in addition to the normal depth chart reconfiguring, with all the high-fructose algorithms rather than the leaner one used for daily updates.

Let’s start with the American League standings.

I was making a “do not panic” argument on behalf of the Yankees back when they were 5–10 and some people were digging for their doomsday preparedness kits, and while it might not be time to find where you left those water purification tablets, the situation is bleaker now than it was three months ago. Not that the team is actually worse; New York has been on an 88-win pace in the games since that reference point. But an 88-win pace isn’t nearly enough to get out of an early-season hole in a division where there are three other teams with more than detectable pulses. Even projected to play solid baseball the rest of the season, the Yankees have gone from the favorite to the projected fourth-place team.

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Last year, Connor Kurcon created dynamic hard-hit rate (DHH%) to add dimension to our typical understanding of Statcast’s hard-hit rate (HardHit%). Whereas HardHit% uses a fixed minimum exit velocity (EV) threshold of 95 mph to determine a hard hit, DHH% uses a — you guessed it — dynamic threshold that changes according to launch angle of the batted ball event (BBE). Kurcon found this orientation of hard-hit rate to be more powerful than its original in terms of describing same-year contact quality (per weighted on-base average on contact, or wOBAcon), predicting next-year contact quality, and predicting itself (year-over-year “stickiness”).

Inspired by a Yermín Mercedes home run off a Willians Astudillo eephus, I borrowed the premise of DHH% and applied it to pitch velocity — that is, the dynamic threshold was based on pitch speed rather than launch angle. Although not as powerful as the original, Pitch DHH% also proved itself superior to HardHit%.

Ever since Kurcon unveiled DHH% in 2020, though, I’ve been thinking about how the premise might apply to spray angle (horizontal angle, lateral angle, whatever you want to call it). It seemed intuitive to me that a hitter would generate more power to his pull side and less to the opposite field. I suspect if you were prompted to guess, you might have said the same. Read the rest of this entry »

There is an interesting quote from Greg Maddux about the relative merits (or, if you’re Maddux, demerits) of “wasting” a pitch in a 0-2 count versus continuing to attack the hitter. Throwing a pitch outside of the zone and hoping for a hopeless swing in an 0-2 count is a baseball convention that’s ingrained in pitchers from the time they are adolescents. The idea is to not give the batter the chance to put the ball in play when the pitcher is in a supremely advantageous position. Maddux eschewed this notion. He said, “The hitter is most vulnerable when you get him in an 0-2 bind. My goal is to take him out immediately. I’m going right after him, not fooling around with wasting a pitch up high or throwing one in the dirt.”

Maddux’s impetus for questioning convention was twofold. First, a waste pitch is (wait for it) a waste. It is a waste of a pitcher’s time and energy and gets him out of rhythm. If you believe that on any given day a pitcher has a finite number of effective pitches in him, then throwing a pitch without the singular purpose of using that pitch to get the batter out is foolhardy. Maddux’s second gripe is that batters have the lowest batting average in 0-2 counts, so why would you fear throwing the ball in or around the strike zone? He also mentions the pitch is usually so far away from the strike zone that the hitter will lay off by default, giving the opposition the opportunity to see one more pitch out of the pitcher’s hand. Maddux is seemingly inferring that seeing this extra pitch assists the batter in timing up a pitcher’s motion, allowing them to gain a small edge in being able to better pick up the ball coming out of the hand.

The merits of a 0-2 waste pitch has been explored in the past. Earlier this yeah, Jim Albert used the same Maddux quote as a jumping off point for evaluating 0-2 pitches at his blog Exploring Baseball Data with R (as an aside, Jim is one of the coauthors of a must-have book if you are interested in getting into baseball analysis). Jim noted that pitchers don’t tend to use fastballs as waste pitches; when pitchers do waste pitches, they are more likely to bury breaking balls below the strike zone. He did note that 0-2 fastballs were located higher than fastballs in other counts, but they still were often in and around the strike zone, and thus were not waste pitches. Back in 2011, John Dewan at Bill James Online found that, in terms of the average plate appearance outcome, there was only a 10th of a run difference in favor of the pitcher between throwing in the strike zone versus outside of it, so there was no clear dominant strategy. Read the rest of this entry »

Aroldis Chapman set off some fireworks at Yankee Stadium on July 4, though Mets fans almost certainly enjoyed them more than Yankees fans. For the seventh time in his last 14 outings, Chapman was scored upon, and for the second outing in a row, he served up a game-tying home run that led to a crushing defeat. The 33-year-old fireballer is in the midst of an ill-timed career-worst stretch, one that has dealt the Yankees’ playoff hopes a significant blow.

In the opener of a Subway Series doubleheader necessitated by Friday night’s rainout, Chapman entered in the seventh inning to protect a 5-4 lead. Under normal circumstances, that would have been a no-brainer move, but the decision raised some eyebrows not only given the closer’s recent struggles but the fact that setup man Chad Green had thrown just two pitches to retire Dominic Smith, the only batter he faced, to end the sixth.

Chapman got ahead of Alonso 1-2 via a three-fastball sequence: a 96.7 mph called strike on the outside edge of the plate, a 98.4 mph ball even further outside, and then a 96.9 mph swinging strike above the zone. When he switched to a slider (a pitch that Alonso has feasted upon this year, slugging .681 when he connects) and hung it in the lower middle of the zone (where Alonso has a .796 xSLG), the slugger crushed it, launching it 406 feet into the visitors’ bullpen:

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