While the Cubs are 22-15 and own a three-game lead in the NL Central — the largest of any team at this writing — the rotation that’s helped them to that perch has taken its hits recently. Last month, 2023 All-Star lefty Justin Steele underwent surgery to repair his ulnar collateral ligament, and Javier Assad suffered a setback while rehabbing to return from an oblique strain. And then on Monday, the Cubs placed 2024 All-Star lefty Shota Imanaga on the injured list due to a left hamstring strain. While his injury isn’t considered to be major, his loss could tighten the division race and test the depth of the already-depleted rotation.

After leaving his April 29 start against the Pirates after five innings due to cramps in both quadriceps, Imanaga cruised through the first five innings against the Brewers on Sunday in Milwaukee, allowing just three singles while striking out four without a walk. The 31-year-old’s afternoon ended on a sour note, however. With the game still scoreless in the sixth, he yielded a leadoff single to Jackson Chourio and then a one-out walk to William Contreras. It looked as though he might escape unscathed when he got Christian Yelich to ground to first baseman Michael Busch, who started a potential 3-6-1 double play. Imanaga ran to cover first base, but not only was Dansby Swanson’s throw a bit late, the pitcher came up limping, forcing him out of the game.

Reliever Julian Merryweather entered, threw a wild pitch that allowed Chourio to score from third, and by the time he got the final out, three more runs had scored in what ended as a 4-0 loss for the Cubs. They suffered a much more gruesome defeat on Tuesday, when reliever Ryan Pressly allowed eight straight Giants to reach base in what became a nine-run 11th inning and a 14-5 drubbing. Read the rest of this entry »

Yesterday, James Fegan wrote a great story at Sox Machine about how Chase Meidroth became one of the most patient players in baseball. The White Sox want Meidroth to be more aggressive, but after a recent call-up, he’s running a minuscule 17.3% chase rate. He ran that exact same chase rate last season in Triple-A, and it ranked fifth lowest among the 381 players who saw at least 500 pitches outside the zone. Here at FanGraphs, Michael Baumann also covered Meidroth’s overabundance of patience a couple weeks ago. Unsurprisingly, Baumann’s article featured something Fegan’s didn’t: a paragraph about nominative determinism. The defining characteristic of Meidroth’s profile is that he’s a Chase who doesn’t chase. But Meidroth isn’t the only Chase in baseball. Maybe he’s an outlier. Maybe the other players named Chase rack up chases, if only out of a sincere desire to obey the fifth commandment.

Chase Utley was the first major league Chase. He debuted in 2003, conveniently just a year after Sports Info Solutions started tracking pitches. That means that we can track the chase rate of every Chase who’s ever played. I went through his year-by-year chase rates in order to calculate a league-adjusted figure, which we’ll call Chase Rate Plus for the remainder of this article. Utley’s Chase Rate Plus was 88, 12% below the league average, and it helped him run a walk rate that was 6% above the league average. In other words, the first Chase in history didn’t chase much either. What about the rest of the bunch? Read the rest of this entry »

Last week, I investigated the increasing divergence between the way pitchers approach same-handed and opposite-handed batters. I learned that pitchers across the league are varying their arsenals more and more every year. But that was a broad look, and I had some follow-up questions. Mainly, who specifically? Which teams? Which players? And how? Today, I’ll provide some answers.

As a refresher, I calculated what I’m calling “adaptation score” by comparing how frequently a pitcher uses his top-two offerings, both against same-handed and opposite-handed batters. Adaptation score is simply the difference between how frequently a pitcher throws his two best pitches when he has the platoon advantage and how often he throws those same two pitches when the batter has the edge. I split the data up by teams to see who was driving the move. First, we’ve got the five most and least adaptable teams in 2025:

Not much to see here. The Dodgers’ being on the bottom might suggest that adaptation is bad, even. But truthfully, there’s a big element we’re missing in looking at the data this way: personnel. Changing who’s on your team, even if you have the same philosophy, can change how you score in this metric. The Dodgers were in the middle of the pack last year when it came to adaptation score. Then they overhauled their pitching staff and ended up here.
Read the rest of this entry »

When the Yankees lost Gerrit Cole and Luis Gil before the season started, I thought they were screwed. Turns out, at least so far, that New York’s stripiest sports team is right where it ended last year: First place in the AL East. That’s because the Yankees, as of this writing, lead the league in home runs, OBP, SLG, and (by a pretty big margin) wRC+. It helps that the rest of the AL East (especially the Orioles) has started slow, but the best defense is a good offense and all that.

And it’s not just Aaron Judge, who is 20% of the way through an offensive campaign that makes Babe Ruth look like Rey Ordonez. Judge can only bat four of five times a game; even he can’t do it alone. But even with Giancarlo Stanton hurt and Austin Wells and Jasson Domínguez offering only token offensive contributions, Judge has had the running buddy he needs. It’s… Ben Rice, believe it or not. Read the rest of this entry »

If you are familiar with Andrés Muñoz, the baseball player, you may know that he is good. It may be enough for you to simply witness and bask in his elite performance, and question it no further. (Rarely are we so content here.) You may not realize he is unusual; you may not care. Often in baseball, being good and being unusual go hand in hand. This is a short exploration, albeit one preceded by an exorbitantly long prologue, of why Muñoz is good and unusual.

If you are familiar with FanGraphs, the baseball website, you may know about approach angles. If not: A pitch’s approach angle is the three-dimensional angle at which it crosses the front of home plate. Broken down into its two-dimensional vectors, it becomes vertical approach angle (VAA) and horizontal approach angle (HAA).

VAA is a description of pitch shape and thus depends on other physical attributes of the pitch — namely, its velocity and acceleration in all three dimensions. While representing the most distilled measurements of a pitch’s movement through space, the velocity and acceleration vectors themselves are functions of release height, release angle, release speed, spin rate, spin axis, spin efficiency… it goes on. VAA, as it happens, is very sensitive to pitch height. Reporting a pitch’s average VAA is not especially meaningful without either providing locational context or stripping it of that context all together.

To accomplish the latter, I developed VAA Above Average. It’s a simple recalculation that communicates a fastball’s flatness or steepness irrespective of pitch height. Through this it’s much easier to see that, for example, flatter VAAs induce higher swinging strike rates (SwStr%) at all pitch heights compared to steeper VAAs (forgive the half-baked visualization):

Read the rest of this entry »

Ben Lindbergh brings on Brandon Uffner, an Orioles and Braves fan, to talk about his two teams’ slow starts to the season, his prescription for fixing them, how he came to root for them, managing his competing loyalties, and more. Then (36:01) he talks to Austin, a White Sox and Rockies fan, about both of his teams bottoming out and how that has or hasn’t affected his appetite for baseball. Finally, (1:04:59), Frequent Stat Blast Correspondent Ryan Nelson joins to deliver several Stat Blasts.

Audio intro: Jimmy Kramer, “Effectively Wild Theme”
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I’ve been writing about the strike zone for a few years now, and if there’s been one overarching theme to my work so far, it’s the inescapable takeaway that umpires are excellent at what they do. When Major League Baseball introduced PITCHf/x in 2008, umpires got 84.1% of ball-strike calls right according to the Statcast strike zone. Over the intervening years, while ever-nastier stuff and a revolution in pitch framing had made their jobs harder and harder, umpires did nothing but get better. Accuracy broke 92% in 2021 and inched its way toward 93% over the next two seasons. That trend of improving every year finally changed in 2024.

As I wrote yesterday, last season marked the first time that umpires got worse rather than better. That’s interesting enough on its own, but right when it was time to wonder whether they’d gotten as good as they could get, the rules of the game changed. Over the offseason, a new labor agreement included a change to the way that umpires are assessed by the league. The grading got much tighter, reducing the buffer around the edges of the strike zone from two inches on the outside of the zone to three-quarters of an inch on either side. The strike zone is the same, but umpires are being judged much more tightly. Let’s dive into the numbers and see what looks different so far this season. Here’s a graph that shows overall accuracy in every season of the pitch tracking era.

The yellow line shows overall accuracy, and it’s ticked back up from 2024. Even though it’s early in the season, a time when umpires are at their least accurate, they’re still doing better than they did last year. Accuracy fell from 92.81% in 2023 to 92.53% in 2024, and is now back up to 92.63%. In fact, if you look only at March and April stats – which is more fair, because umpires are worse earlier in the season – you’ll find that umpires just had their best opening month of the season ever. They called 82% of pitches in the shadow zone correctly. Read the rest of this entry »

Though they’ve lost two straight to trim their AL West lead to a single game, the Mariners are a first-place team thanks to a recent 16-4 stretch that has boosted their record to 20-14. As I noted last week, their success for a change hasn’t been driven by the strength of their rotation, which has been without George Kirby thus far due to shoulder inflammation and is now without Logan Gilbert, who landed on the IL in late April with a flexor strain. Rather, Seattle been carried by an exceptionally potent offense, a marked contrast from recent years, particularly 2024, when the team’s failure to score contributed to the August firings of manager Scott Servais and hitting coach Jarret DeHart. These Mariners have benefited not only from Cal Raleigh’s heavy hitting, but from the ongoing presence of Randy Arozarena, who was acquired just before last year’s trade deadline, and rebounds from players who struggled due to injuries last season, such as J.P. Crawford and Jorge Polanco. The return of Hall of Famer Edgar Martinez to their coaching staff has helped, and it does appear as though T-Mobile Park has been a bit more forgiving than usual.

Raleigh and Polanco are the hitters getting the headlines. Raleigh is currently slashing .240/.359/.574 with a major league-high 12 homers, and he ranks third in the AL in slugging percentage behind only Aaron Judge and Alex Bregman, and fourth in the league in wRC+ behind those two and Jonathan Aranda(!). While Polanco doesn’t have enough plate appearances to qualify for the batting title because an oblique strain has limited him to swinging left-handed and to DHing instead of playing the field, he’s hit a ridiculous .369/.407/.750 (233 wRC+) with nine homers in just 92 plate appearances (14 short of qualifying). Crawford is batting .294/.417/.404 (151 wRC+) and Arozarena .224/.366/.414 (136 wRC+). Both players are walking over 15% of the time, with Raleigh drawing a pass 14.4% of the time; the team’s 11.2% walk rate leads the majors.

All of that has helped the Mariners withstand a comparatively slow start by Julio Rodríguez (.206/.308/.375, 103 wRC+) and a wave of injuries that has forced right fielder Victor Robles, outfielder-first baseman Luke Raley, utilityman Dylan Moore, and second baseman Ryan Bliss to the injured list alongside the aforementioned rotation stalwarts [Update: Moore was activated just after this article was published]. Even so, the Mariners have gotten a 100 wRC+ or better from every position besides first base (where Rowdy Tellez, Donovan Solano, Raley and Moore have combined for a 60 wRC+) and right field (where six players, among them the injured Robles, Raley and Moore, have combined for a 90 wRC+). Read the rest of this entry »

Bailey Ober wasn’t highly regarded when our Minnesota Twins Top Prospects list was published in December 2019. The towering 6-foot-9 right-hander was ranked no. 40 with a 35+ FV. And our prospect-analyst team at the time wasn’t alone in having relatively low expectations for him. Baseball America’s 2020 Prospect Handbook didn’t include Ober in its 30-deep rankings of the Twins system, nor did MLB Pipeline find room for him in its own top 30.

Yet despite the lack of hype, Ober is now a mainstay in Minnesota’s rotation. A 12th-round pick out of the College of Charleston in 2017, he made his major league debut in May 2021, and he’s since gone on to log a 3.76 ERA and a 3.89 FIP over 95 starts comprising 510 innings. So far this season, Ober has toed the rubber seven times and has a 4-1 record to go with a 3.72 ERA and a 3.85 FIP.

What did his FanGraphs scouting report look like at the time? Moreover, what does he think about it all these years later? Wanting to find out, I shared some of what Eric Longenhagen and Kiley McDaniel wrote, and asked Ober to respond to it.

———

“There’s very little precedent for someone with Ober’s velocity having big league success, but it’s clear why his mid-80s fastball has been dominant to this point.”

“That was the year my velo dipped way down,” Ober said. “I was 92-94 before that. My mechanics were terrible. We were trying to work on some stuff and it just went in the wrong direction. But I also had the best success I’d ever had, stats-wise. My ERA was [0.69] that season, which is why no one was in a rush to change anything. I was able to blow guys up with 88 mph.”

“His size and deceptive overhand release point create tough angle on his stuff.” Read the rest of this entry »

It isn’t supposed to be this easy. When the Phillies traded for Jesús Luzardo over the winter, they did so with the understanding that he wouldn’t be an ace right from the jump. He was coming off a rough and injured 2024, he’d only hit 20 starts in a season once in his career, and every warning light you could possibly imagine was flashing – worst stuff model grades of his career, lowest strikeout rate, lowest whiff rate, highest hard-hit rate.

Those warning signs explain why the Phillies were able to acquire Luzardo for relative peanuts. It also explains why our projection systems were unenthused by him heading into this year, projecting a 4.19 ERA, a distant fifth among Philadelphia’s starters. No one doubts Luzardo’s potential, but after six seasons and 500 innings (itself not a great sign) of roughly league-average work, well, at some point you are what you are.

Right, yeah, Luzardo’s been the best pitcher on the Phillies this year and one of the best pitchers in baseball. I’m not as surprised as I thought I’d be. But given that we’re a quarter of the way through the season and his ERA and FIP are both below 2.00, I think it’s time to take a closer look at what he’s doing differently.
Read the rest of this entry »