Batters swing slower in the cold, but I’m not sure that it matters.

Bat speed goes down when it’s cold, and it goes up when it’s hot. This is something that’s both literally true and curiously linear. We can see in the plot below that bat speed climbs bit by bit as temperature rises from chilly to toasty:

My first thought is this makes sense. It’s reasonable to assume batters don’t swing as fast when their muscles are stiff and their hands are numb. I’ve been cold before, and yeah, it’s difficult to perform tasks requiring fine motor skills.

My second thought is I’m skeptical. Notice the scale of the plot. All that movement amounts to about 0.6 mph from the coldest games to the warmest games. Lots of things other than temperature could be driving this relationship. Bat speed goes down with velocity. Velocity goes up with relievers. Relievers enter games late. Temperature goes down at night. You can see how this could get tricky.

Let’s build a model. Read the rest of this entry »

The Blue Jays have lost another key player to injury.

Alejandro Kirk left Friday’s game against the White Sox in the 10th inning after a foul tip glanced off his glove hand. He immediately dropped his glove, grabbed his thumb, and hustled into the clubhouse with trainers. The team after the game announced Kirk had fractured his thumb. No timeline for a return was given. Our injury log suggests batters with thumb fractures typically return in about four to eight weeks, although Kirk fractured the thumb on his catching hand, which could require a longer recovery.

It’s the latest significant injury for the reigning AL champs, who lost Cody Ponce last week while fielding a grounder in his first start in the majors since 2021. Trey Yesavage, José Berríos, and Shane Bieber are on the injured list, as well, though each is in the “throwing” process of his rehab. Read the rest of this entry »

Jo Adell performed a miracle. Let’s turn it into math.

Adell robbed the Mariners of three home runs on Saturday. He got Cal Raleigh in the first inning, Josh Naylor in the eighth, and J.P. Crawford in the ninth. Sports Info Solutions has tracked home run robberies since 2004 and only twice had an outfielder robbed even two home runs in a game — nobody had ever robbed three.

Each catch was crucial. The Angels wound up winning 1-0, with Zach Neto’s leadoff solo shot in the first inning being the only run of the game. That means Adell was thrice the difference in the Angels’ narrow victory.

Win Probability Added doesn’t agree. It suggests Adell overall hurt the Angels’ chances of winning by about 3%. Position players only gain WPA on offense — Adell went 1-for-3 with an irrelevant single — so he didn’t get credit for any of these catches. WPA instead gives all the glory to the pitcher, with the assumption that an out is an out on defense, and the only thing that can be known about an out is who threw the ball (in this case, Jack Kochanowicz, Sam Bachman, and Jordan Romano).

While this assumption makes sense for nearly all plays and scenarios, home run robberies are a bit different. They’re definitive. We know what the outcome was, and we know what the outcome would have been had Adell not intervened.

How much was each catch worth? And how much credit does Adell deserve? Let’s take a look. Read the rest of this entry »

The outcomes are truer than ever.

The Mariners did not record a single in their first two games of 2026. No team had ever done that in major league history. In fact, only eight teams have ever gone back-to-back games without a single, according to MLB.com’s Sarah Langs.

The reason is obvious. The Mariners didn’t hit a single because they didn’t put the ball in play very often. And frankly, how could they? Guardians pitchers threw less than 40% of their pitches in the zone, and the Mariners were forced to lay off them, drawing walks in 13.6% of their plate appearances during those two games. When the Guardians did enter the zone, the Mariners struggled to make contact, striking out 35.8% of the time. That means only 34 (50.8%) of their plate appearances ended with a batted ball. And because the Mariners employ a number of sluggers, six of those batted balls flew over the fence. Read the rest of this entry »

Cody Ponce left his first start on a cart with a trainer.

Ponce collapsed in considerable pain Monday after making an awkward attempt to field a grounder in the third inning against the Rockies. He appeared to twist his right knee in a direction it’s not meant to go. He stood and limped to the cart on his own before exiting. Blue Jays’ manager John Schneider said after the game that Ponce will get an MRI.

The injury is an unfortunate setback for Ponce, who was making his first start in the majors since 2021. He was perhaps the most anticipated in a quartet of free agent pitchers who signed out of the KBO or NPB this winter. I’d already planned to write about each of them, leading with Ponce for the reasons he displayed before the injury. And while I don’t want to overreact to one start, I think there are interesting takeaways from each that could inform the shape of their respective seasons to come. Read the rest of this entry »

There’s paint on the field, bunting on the steel, and hoopla in our feels. It’s Opening Day no doubt. Well, the third one, at least.

The most iconic trapping of Opening Day is the fleet of excellent starting pitchers who take the mound. Each team sends their best, or at least, their healthiest. For some, it’s the reigning Cy Young winner. For others, it’s a precocious prospect. These starters, true to their name, carry the burden of the new season in their shoulder.

Few carry a burden greater than Luis Severino’s. Read the rest of this entry »

The Mariners are favorites in the American League on the back of an all-time duo.

Cal Raleigh and Julio Rodríguez are the best teammates in the AL. They’re each projected to be among the top 10 batters by FanGraphs Depth Charts, and each led their respective positions in our annual positional power rankings series. The only pair of teammates projected for more WAR in 2026 are Shohei Ohtani and Mookie Betts and Ohtani and Kyle Tucker.

Since their first season together in 2022, Raleigh and Rodríguez have combined for 44.2 WAR. At 11.1 wins per season, that’s “on pace” for the best duo in team history, just ahead of Ken Griffey Jr. and Alex Rodriguez (65.9 WAR over six years), Griffey and Edgar Martinez (119.3 WAR over 11 years), and all sorts of other combinations from the star-studded squads of the 90s. Raleigh and Rodríguez certainly have much more to achieve before approaching these all-time greats, individually or together. But as the Mariners enter their 50th season, it appears the legacy of the franchise may finally be moving beyond its past. Read the rest of this entry »

Starting rotations have five slots.

Yes, every once in a while a team will pretend to have four or six slots, but that team must inevitably confront the truth: Starting rotations have five slots. It’s a matter of policy, preference, and just plain practicality, Mariners general manager Justin Hollander said last year in an interview with Lookout Landing.

“The unfortunate thing about the roster rules is you only get 26 spots, and you only get 13 pitchers. And when you add a sixth starter, you take away a reliever. When you add a sixth starter, sometimes your starters pitch every six days, sometimes they pitch every eight or nine days. Starting pitchers are fussy. They don’t like that. They like to stay on a regular schedule. They like to know when they’re pitching.”

I’ve been thinking about the fixed-nature of rotations lately after reading this discussion between Eno Saris and Jen McCaffrey in The Athletic. They compare the rotations in Detroit and Boston by assigning each pitcher a label (one, two, three, four, five), sizing them up horizontally and vertically, and confronting the trade-offs in quality and depth. This reflects how many of us compare rotations in the abstract, and I wanted to see if this could be applied more broadly. Read the rest of this entry »

Kyle Teel has some catching up to do.

Teel is set to begin the season on the injured list. He pulled his hamstring while legging out a double for Team Italy last week at the World Baseball Classic. The diagnosis is a Grade 2 strain, which could keep him out for most of April. It’s an unfortunate start to what was meant to be his first full big league season.

In some ways, this answers a crucial question for the White Sox: Who will start at catcher on Opening Day? Teel, 23, would have been the obvious choice for most rebuilding organizations. He was a top 100 prospect last year before his debut in June, and he then posted a 125 wRC+ in 297 plate appearances. He’s at the forefront of Chicago’s burgeoning prospect pipeline and a key figure as the organization searches for its next core.

But the same can also be said for Edgar Quero, a similarly rated prospect who debuted last year at just 22 years old. Quero is now set for the starting job right out of camp, and he’ll have the first chance to showcase his development in 2026. Read the rest of this entry »

The Angels haven’t changed. It’s Mike Trout who is worse.

The Angels are bad. It’s the truest thing about them. Their hitting is bad, their pitching is bad, their fielding is bad, and everything else is bad, too. This isn’t breaking news. They’ve finished below .500 each year since 2015, the only team not to make the postseason in that time. But expectations have reached a new low as we enter 2026:

I was initially skeptical of these figures, or at least the direction of them. How could the Angels possibly be going backwards? They don’t seem to be rebuilding, and their depth chart looks the same as ever: a few truly good players, a few players who would be good if they were playing a different position (or perhaps in a different organization), a few players who were drafted far too recently, a few aging veterans who were nearly All-Stars at one point, and Trout. Read the rest of this entry »