For the better part of five years, Corey Kluber was borderline unhittable. At his double-Cy-Young peak, he was a one-man dead ball era, putting up a 2.85 ERA even as offensive numbers exploded across the league. Though he never closed the deal, he felt like a threat to pitch a no-hitter every time he started.

Kluber isn’t the same pitcher he once was. His walk rate is nearly double where it sat in those halcyon years; his strikeout rate has declined. His fastball doesn’t always crest 90 mph anymore. But he still has that same vicious cutter/slurve combination that powered his ascent, and let’s be honest with each other: This year, nearly every pitcher feels like a threat to throw a no-hitter every time out.

Kluber no-hit the Rangers last night, a capstone achievement that will forever feel slightly out of place with the arc of his career. That’s not to discount the moment: He was excellent last night. He worked off of his slurve rather than vice versa; he threw 31 of them and only 23 sinkers. From the start of the game, he was placing the pitch exactly where he wanted it, befuddling the Rangers’ lineup:

Kluber’s ceaseless desire to fill up the zone worked in his favor last night. He drew a whopping 25 called strikes, a number he hadn’t surpassed since his glory days. Batters step in against him wondering which breaking ball he’ll embarrass them with, which is a truly awful mindset to take into at-bats against a strike-throwing machine, but that’s always been his unique gift: He throws so many pitches that break at so many strange angles, putting batters at a disadvantage right from the jump.
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Stop me if you’ve heard this one before. Why is it so easy to fill in the pool that the Washington Nationals own? That’s right — it has no depth. The Nats have relied on a stars-and-scrubs approach for years, hoping that their stellar headliners can offset some of the clunkers at the bottom of the roster. Sometimes it works and sometimes it doesn’t, but the central motivation behind their roster has been strikingly consistent in recent years.

In 2021, some of the stars aren’t shining as brightly as the team hoped. Juan Soto has missed three weeks with injury and is off to a slow, power-sapped start. Stephen Strasburg made only two starts before landing on the Injured List. Patrick Corbin has been disastrous. Offseason acquisitions Josh Bell and Kyle Schwarber, who were supposed to stabilize the lineup, are off to slow starts, Bell in particular. It’s not a great year for the boom/bust roster-building philosophy.

In a great stroke of irony, however, the Nats have found a solid bat that could lengthen their lineup and give Soto and Trea Turner some help. There are just two problems: they have nowhere to play him, and he still has some tinkering to do. Yadiel Hernandez looks like the kind of hitter that good teams need, an above-average bat summoned from the minors. Due to the team’s roster construction, he’s been banished to the bench. Should a spot open up, however, he might be the exact thing the team has been missing.
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The Mets have been no strangers to injury this year. As Jay Jaffe detailed yesterday, Michael Conforto and Jeff McNeil aggravated injuries on the same play Sunday afternoon. When Kevin Pillar was hit in the face by a pitch on Monday night, the situation worsened. In an attempt to keep their roster afloat, the Mets acquired Cameron Maybin from the Cubs for cash considerations, as Bob Nightengale first reported.

Maybin will be reporting to Triple-A, but that state of affairs probably won’t last long. The Mets started Khalil Lee and Johneshwy Fargas in the outfield last night, which brought their combined career major league start total up from one (Fargas started Monday night) to three. Dominic Smith anchored the unit, as it were, but Fargas and Lee have combined for 72 plate appearances above Double-A. It’s clearly not a working solution for the injury-ravaged club.

Maybin is an obvious short-term upgrade, but not so long ago, he looked like he might be more than an injury fill-in. In 2019, he played an abbreviated season with the Yankees and unlocked heretofore unseen power; his 11 home runs were a career high despite only 269 plate appearances. Read the rest of this entry »

What’s the most important characteristic of a slider? Let me show you a table:

There are two things that might need explaining in here. The attack zones are Baseball Savant’s way of cutting the strike zone up into granular pieces, and I think they’re neat. They look like so:

Run values are from the batter’s perspective, so that -785 runs in the shadow zone means that batters have been 785 runs below average — what they’ve done on all pitches across the whole year — when they faced sliders in the shadow zone. In other words, sliders on the corners of the plate have been excellent — not really a shock.

What’s the most important characteristic of a slider, then? Well, allow me to show you a different table:

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Pierce Johnson wasn’t the highest-profile addition the Padres made before the 2020 season. Johnson, a right-handed pitcher who began his career in the Cubs minor league system as a starter, transitioned to relieving and then transitioned to Hanshin in the NPB, where he delivered a standout 2019 season. Along with fellow offseason acquisitions Drew Pomeranz and Emilio Pagán, he was part of a reworked bullpen for a newly-aggressive contender.

Johnson’s 2020 went fairly well, aside from the whole global-pandemic-changing-the-entire-world part. He started throwing harder during his sojourn to Japan, and held that new velocity upon his return. His blend of roughly 50/50 fastballs and curves played quite well; he put up a 33.8% strikeout rate en route to 20 innings of 2.70 ERA, 3.14 FIP relief.

In truth, Johnson’s fastball was just a palate cleanser for his devastating curve. He used it early in counts and when he got behind, but threw nearly 75% curveballs in key spots — 1-0, 0-1, and 1-1 counts, as well as when he reached two strikes. It’s easy to see why when you look at the curveball’s merits. Among pitchers who threw at least 150 curves last year, it was one of the best in the game:

That’s excellent company, to state the obvious. It’s not as though the pitch is a wipeout breaker that only excels when he bounces it, either. In obvious strike-throwing counts (2-0, 2-1, 3-0, and 3-1) since returning from Japan, Johnson has hit the strike zone with his curveball 58.6% of the time. That’s higher than his fastball zone rate in the same counts (42.1%) and higher than the overall league zone rate for all pitches in those counts (56.9%).
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Last week, I investigated something that I’ve long wondered about: are relievers particularly prone to wildness on their first batter of the game? I didn’t find much of an effect, and I also got tons of valuable feedback about further avenues for investigation. Do base/out states matter? Does handedness matter? Do intentional walks skew the data?

Aside from the last one (a definite yes), I haven’t explored all of these avenues yet. I did, however, answer another question I was curious about, one that ties into the general theme of reliever walk rates. I’ll tell you upfront that I found a confusing result, and that I’d love to hear anything I’ve missed or avenues for further investigation.

Here’s the question I’m answering: when a reliever walks the first batter he faces, what does that tell us about the rest of his appearance? All of us have seen this in practice, and we probably all know the existential dread it engenders. Great, he doesn’t have his command today. How many walks are coming up? Is the lead safe? Will the team even stay in the game long enough for a new pitcher comes in?

To explore this possibility, I examined every game thrown by a reliever since the beginning of the 2015 season. I split each reliever’s appearances into two subsets: every appearance where they unintentionally walked the first batter they faced on one hand, and every other appearance (except intentional walks, I threw those out) on the other. This gave me a sample of 1,085 relievers across more than 80,000 appearances. Read the rest of this entry »

When we last checked in on our partially crowd-run Out Of The Park Baseball team, the season wasn’t yet underway. We spent the offseason building pitching depth after a nightmarish injury season left us with a bullpen made of duct tape and late-season callups. In an effort to avoid a recurrence of that problem, we came into this season with pitching depth that could best be described as excessive.

Even after trading Eric Lauer (more on that in a second), the team went seven deep on starters: Brandon Woodruff, Kevin Gausman, Collin McHugh, Freddy Peralta, Adrian Houser, Corbin Burnes, and Brent Suter are all at least candidates for a rotation spot. Surely, I (and you) reasoned, that depth will sustain us even if injuries become a problem again.

Good news: through 42 games, injuries haven’t been a problem. Our top five starters have made all 42 starts, though virtual Adrian Houser is headed for the bullpen unless he turns things around quickly; his 10.64 ERA isn’t reflective of his true talent, but his 9.25 FIP isn’t exactly a great sign. He’s become a two-pitch pitcher in this simulation, so a swap with Suter might suit both.
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In 2018, Matt Barnes had a promising season for the Red Sox. He struck out 36.2% of the batters he faced en route to a 3.65 ERA and 2.71 FIP. His one weakness? He walked 11.7% of the batters he faced, a dangerous number. That pattern carried through to 2019; he struck out 38.6% of his opponents but walked 13.3% of them. That strikeout rate is wonderful, but the walks gave him little margin for error, as evidenced by 2020, when he struck out 30.4% of his opponents (still great) but walked 13.7% on his way to a below-replacement-level season.

In 2021, you’ll never believe it — Barnes is striking out the world again, with a 48.4% strikeout rate that’s fourth among relievers, behind only Aroldis Chapman, James Karinchak, and Josh Hader. Oh yeah — he’s also walking 4.8% of his opponents and has been quite possibly the most valuable reliever in the game. Let’s get an explanation for that, shall we?

At surface level, it’s easy! Take a look at swinging strike rate, a statistic that becomes reliable quickly:

A 19.1% swinging strike rate is excellent; top-of-the-league excellent, really. Also true: Barnes hasn’t changed his pitch mix. He’s a two-pitch reliever, with a riding four-seamer and hammer curve. He throws them both roughly half the time, and they spin more or less exactly opposite out of his hand, which seems to help them both play up:

Great, problem solved. Hard curveball, decent fastball, they both play into each other’s deception, sounds like a good reliever to me. One small problem: there are maybe 50 relievers like that in baseball, and Barnes was also like that in the past, when he was far more walk-prone without his current killer strikeout numbers. Read the rest of this entry »

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