I don’t know if this happens to my colleagues, but I get attached to the players I write about. I can’t help it. Cormac McCarthy once wrote, “Things separate from their stories have no meaning,” and I’ve found that learning a player’s story, even if it’s just the story of why they need to lay off the slider, is enough to imbue them with an extra layer of meaning. Last year, I wrote about Jose Altuve after both the ALDS and the ALCS. It made me feel more connected to him, and during the World Series, whenever he came to the plate when my fiancée was in the room, I’d say, “That’s my little guy!” I really said that (and she really married me anyway).

Back in spring training, I wrote up our Positional Power Rankings for third base. It was a real crash course. We had projections for 149 different third basemen, and I needed to learn enough about each of them to articulate an opinion on what they’d do this year and why. I learned a lot about what I value when it comes to player performance. The exercise also informed the way I’ve watched the game this year. Diving deep into a league of third basemen, I formed attachments to all these players, especially the young ones, as I read prospect evaluations and beat reports and thought about their potential. Now that we’re nearing the halfway mark, here’s an update on the rookies I’ve been rooting for. Read the rest of this entry »

So here’s what happened. I was watching the MLB game highlights of Tuesday’s Marlins-Blue Jays matchup. I like MLB’s game highlights; in order to keep all the quick cuts from feeling disjointed, they kind of just plop some music on top everything unceremoniously, and sometimes the music can really color your perception of the game. This Mets-Padres game from April is a great example. It was a nailbiter, but it lost some of its nerve-wracking heft thanks to a soundtrack that’s a cross between John Coltrane, Kool & The Gang, and Super Mario 3.

Two on, two out, bottom of the ninth, and it sounds like the monologue is about to start on Saturday Night Live. Anyway, I was watching Tuesday’s Marlins-Jays highlights (the soundtrack for which sounds like The Living End on their union-mandated lunch break), and I noticed this single from Luis Arraez.

Normally, a single from Arraez is about the least remarkable thing in baseball. He is the game’s preeminent singles hitter (and depending on your worldview, perhaps the game’s preeminent hitter, period). What caught my eye was how quickly Daulton Varsho managed to cut this ball off, considering that Arraez slashed it just a foot inside the left field line. Varsho gets fantastic jumps, but I figured he also had to be playing extremely shallow. It occurred to me that maybe every outfielder is playing right on top of Arraez this year, seeing as dumping liners right in front of the outfielders for singles is his superpower. Read the rest of this entry »

If we’ve written it once, we’ve written it a hundred times: Pirates third baseman Ke’Bryan Hayes is a solid player, but if he could just figure out how to hit the ball in the air, he’d be a star. Well, here we are in June 2023, and it appears that Hayes has finally started elevating the ball some.

For the second season in a row, Hayes has knocked at least five percentage points off his groundball rate, increased his hard-hit rate and average exit velocity, and more than doubled his launch angle. And for the second season in a row, his overall performance at the plate has stayed almost exactly the same. Let me say this very clearly: We were wrong. We are so sorry. We will work to do better in the future. Let’s take a look at what exactly Hayes has been doing to make liars out of us. Read the rest of this entry »

I think people tend to overestimate their ability to avoid disappointment. We try to temper our excitement so that we won’t feel let down when something goes wrong, but it doesn’t really work. The bad times are always going to hurt. More importantly, tempering your excitement can limit the joy you experience when things finally go right. Nothing strangles happiness in the cradle like that little voice in your head that keeps whispering, “It’s probably going to fall apart.”

I’m not saying we should all be walking around puffed up with unfounded optimism. I just think that some things warrant excitement, that we should trust ourselves to recognize them, and that we should allow ourselves to enjoy them fully. To borrow a line, I think you ought to follow your heart. That’s all I ever thought about anything.

Last year, over 32 games and 115 plate appearances, a 21-year-old Corbin Carroll put up a wRC+ of 130. Excelling in the outfield and on the basepaths as well allowed him to rack up 1.4 WAR. That’s a 7-win pace. He wasn’t perfect: his walk and strikeout rates were nothing to write home about, and while his .358 wOBA said Alex Bregman, his .293 xwOBA said Raimel Tapia. But in all, it was enough to make Carroll our No. 2 prospect in baseball, net him a downright effervescent ZiPS projection and an eight-year, $111 million contract extension, and establish him as our staff’s runaway favorite for NL Rookie of the Year. Corbin Carroll in 2022 was a first date where you’re talking and laughing and then all of a sudden you look at your watch and realize five hours have passed. He was worth getting excited about. Read the rest of this entry »

The calendar just flipped over to June, and somehow we have yet to write even one article about the best position player in all of baseball this season. Not that it’s a surprise; nothing about the best position player in all of baseball is a surprise.

If you Google “Freddie Freeman” and “killer,” in just the first page of results, you’ll find references to Freeman as a Nats killer, a Braves killer, a Mets killer, a Phillies killer, and a Cubs killer. (If you don’t use the quotation marks, you’ll get references to Freeman as a Mets killer and a Nats killer, plus a bunch of headlines about an actual murderer.) But here’s the thing: if you look at Freeman’s performance against every team in baseball and rank them by wOBA, only one of those five teams is even in the top 12. It feels personal no matter who you root for, but Freeman is just an everybody killer. It’s a conundrum straight out of Catch-22.

“They’re trying to kill me,” Yossarian told him calmly.
“No one’s trying to kill you,” Clevinger cried.
“Then why are they shooting at me?” Yossarian asked.
“They’re shooting at everyone,” Clevinger answered. “They’re trying to kill everyone.”
“And what difference does that make?”

(The Braves are the one team that’s actually in the top 12; they’re number four. Freeman has a .361 average and a 206 wRC+ against them, and for obvious reasons he may actually want to kill them.) Read the rest of this entry »

You know what’s important? Pitches. Almost all of the big stuff that happens on a baseball diamond starts with the pitcher pitching. Even Babe Ruth never once hit a home run without somebody throwing a pitch first.

Now that we’re more than a quarter of the way through the 2023 season, let’s take a look at the pitches. Specifically, we’re going to take a look at long-term trends, and talk about the ways in which this year has (or hasn’t) followed them. As such, I need you to prepare yourself for a whole lot of line graphs. In fact, just to drive home how many line graphs are in this article, here’s a bar graph:

Last week we ran 26 regular articles, in addition to chats, podcasts, prospect lists, and power rankings. We’re pretty busy. There were fewer line graphs in those 26 articles than there are in the next couple thousand words.

You know what? Seeing as the only bar graph in the past week is the one you just saw, maybe we should also give a quick update to our little guy.

Much better. Read the rest of this entry »

I don’t know about you, but I was very excited about the Blue Jays’ outfield coming into this season. In December, the team signed veteran defensive wizard Kevin Kiermaier to take over in center field, pushing incumbent George Springer to right. Just a few weeks later, they sent catcher Gabriel Moreno to the Diamondbacks so that young defensive wizard and all-around rising star Daulton Varsho could play left. If you’re keeping score at home, that makes one George Springer and two defensive wizards. Most teams don’t have two defensive wizards. There just aren’t that many wizards running around, and the ones who play baseball tend to prefer the infield. The Blue Jays had three center fielders, two of whom were well-respected veterans with long track records on successful teams, two of whom were coming off four-win seasons, and two of whom could reasonably claim to be, when healthy, the best defensive outfielder in all of baseball. That’s a pretty exciting Venn diagram.

Read the rest of this entry »

So far this year, there have been two ejections and suspensions for sticky stuff, along with two notable non-ejections. In all four instances — two of them just in the last week — the umpires involved made themselves available to a pool reporter for comment after the game. I cannot for the life of me imagine that the umpires want to be making these statements, but here’s the thing: So far as I can tell, they’re not required to. There’s no way that on an umpire’s list of favorite things to do after a game, Describe How Sticky Max Scherzer’s Hand Was ranks anywhere near the top 10. And yet, whether to justify their actions or out of a sincere belief that sunshine is the best disinfectant, the umpires have dutifully attempted to answer that impossible question. Not that I’m complaining. I adore these explanations. I don’t know how anyone could actually do a good job of explaining how sticky a hand was, but watching big league umpires give it their best shot is a truly rewarding experience.

I spent a morning trying to look up how tackiness is measured. It turns out there’s no one answer, but there is an ocean of scientific debate to dive into. I can now tell you the difference between probe testing, loop tack testing, the rolling ball test, and the peel adhesion test. Each test needs to account for variables like dwell time, contact pressure, temperature, and test speed. There’s also something called the finger test, which isn’t as gross as it sounds (but also probably is). Read the rest of this entry »

It’s officially hot start season. Now is the time when we write about players who have rocketed out of the blocks, then hope beyond hope that they don’t tumble to the track immediately after our articles get published. Today I’m looking at Jonah Heim, the Rangers’ switch-hitting catcher.

Heim has started off the 2023 season in a big way. Then again, maybe that’s not news, as Jonah Heim just has a tendency toward bigness. He’s 6-foot-4, which really should be too tall to be a catcher. Seriously, here he is (crouched!) next to Nick Madrigal just over a month ago:

I would pay good money to watch Heim pat Madrigal on the head and address him as “Scout.” Last year, the Rangers backstop accrued 2.8 WAR, which made him a top-10 catcher in baseball. It’s now May 17, and he’s already put up 1.9 WAR, ninth among all position players and second only to fellow-former-Athletic Sean Murphy among catchers. He’s slashing .313/.368/.519, up from .227/.298/.399 in 2022.

Last week, Esteban Rivera included Heim in an article about hitters who had improved after adding some movement to their swings this season. At that point, I was also interested in Heim’s breakout, but while I was watching him I got distracted by one of his very twitchy teammates. Heim’s production at the plate has improved in every single season of his career, and that trend will almost certainly continue this year. Even if his production were to fall off a cliff starting today, he’s already banked 144 plate appearances with a 144 wRC+.

When we talk about player breakouts, we look for reasons to believe that whatever changes they’ve made will stick around. We look for skills and tendencies that they haven’t demonstrated before, specifically the underlying metrics that tend to stabilize more quickly. Toward that end, I’m going to show you an extremely busy graph. Feel free to give it a quick glance and move on. Its purpose is to show you that almost nothing Heim is doing right now is completely without precedent:

Heim is at a career high or low in these metrics, but it’s worth keeping in mind that over the course of his young career, he’s already logged stretches at or near his current rate in all of them. If you’re looking for something in the numbers that says Heim is a completely new hitter, you’re likely to come up empty.

As a note, in this article I won’t spend much time separating out Heim’s approach or results from the left and right sides, because he’s only had 36 plate appearances as a righty. Almost all of the trends I’ll mention are true on both sides of the plate, but there’s just not enough going on from the right side to draw separate conclusions.

Let’s start with Heim’s approach. He’s been more aggressive at the plate, but he’s also been taking the first pitch more than ever:

If you ignore 0-0 counts, his swing rate on the pitches over the heart of the zone is four points higher than it was last year. Overall, his swing rate on pitches that Baseball Savant classifies as meatballs is up more than 10 points.

This increased aggression has lowered Heim’s contact rate just a tiny bit, so his walk rate has dropped by a tick while his strikeout rate has held steady. However, it’s worth noting that Heim’s contact rate has dropped significantly on pitches outside the zone and risen on pitches inside the zone. A couple weeks ago, I noted that Randy Arozarena was doing the exact same thing: “He’s making more contact in the zone and whiffing more when he chases. I don’t know how repeatable that is, but it’s a neat trick if you can pull it off.” The trick was not, in fact, repeatable for Arozarena. Since then his zone contact rate has crashed, and it’s now to five points beneath its 2022 level. That’s definitely something to keep an eye on for Heim, but I’ll also note that he’s seeing an elevated number of pitches on the edge of the strike zone, and that’s likely the kind of statistical noise that could be affecting these numbers.

As I’m sure you’ve surmised, if Heim’s walk and strikeout rates haven’t changed much, then his newfound success must be driven by what happens when he puts the ball in play:

Well that definitely looks much better. Although Heim has not yet touched his max exit velocity from either 2022 or 2021, he’s hitting the ball harder, and he’s also barreling it up more often. Both his wOBA and his expected wOBA are more than 100 points better than they were last year. From both sides of the plate, Heim is hitting the ball in the air more, which is good, but we’re not just talking about average launch angle. We’re also talking about launch angle tightness. Take a look at his launch angle charts:

Heim has dropped the standard deviation of his launch angle by nearly six degrees, which is a huge amount. His popup rate is down 3.6 percentage points and his groundball rate is down 7.5. See the red area on the left, where all of Heim’s hits came in 2022? In 2023, that’s pretty much the only place he’s hitting the ball. In 2022, 55% of Heim’s batted balls came off the bat between 0-45 degrees. In 2023, it’s 73%. Jonah Heim is actually building the whole plane out of the black box.

It’s not just that Heim is hitting the ball in the air. Heim was already a pull hitter, but he’s increased his pull rate to 53.3%, eighth highest in the league. If you refer back to the busy graph at the beginning, you’ll note that his pull rate really took off early last summer. However, when it came to fly balls and line drives, he pulled the ball just 20% of the time last year. This year he’s at 52%. When he does pull the ball in the air, Heim’s performance is roughly the same as it was last year (although his expected stats are improved). It’s just that he’s doing that a lot more often.

As Esteban noted in his article, Heim’s swing adjustments have helped him reach pitches lower in the zone, which would help explain why he is missing less often against breaking stuff and hitting those breaking pitches 6 mph harder than he did last year. Here’s what that looks like in a heat map. Lots more contact at the bottom of the zone, even though his swing rate down there hasn’t changed nearly as dramatically:

Here’s one thing I find really interesting. So far I’ve been grouping Heim’s air balls together, but here’s what happens when you separate out his fly balls and his line drives:

Last year, Heim’s line drives were scorched at 96.5 mph, while his fly balls were hit at 89.9 mph, right around his average EV. This year, that trend has been completely reversed.

That’s probably a good thing. First, players hit a lot more fly balls than they do line drives. Second, as long as they’re not hit softly, line drives are always valuable. Despite dropping 6 mph, Heim’s line drives have only shed 23 points of xwOBA. Fly balls are more dependent on exit velocity to make it past outfielders and over the wall, so Heim’s xwOBA on them jumped more than 200 points. For both reasons, Heim has benefitted from allocating his EV where it can have the most impact.

Between this chart and his launch angle graphs, it seems reasonable to assume that Heim’s swing is geared more toward elevation than it was in the past. Last year, when he really got hold of a ball, he was hitting it at about 18 degrees. This year, his hardest hits have come anywhere between 16 and 34. However, his soft hit rate is also the lowest it’s ever been. Maybe it’s just that he’s just adding some liners by muscling a few more pitches over the infield than he used to, pitches that he might previously have popped up or rolled over. As I said at the beginning, most of Heim’s underlying metrics show him doing things that he’s been able to do before. Being aggressive while still walking and striking out at the same rate, pulling the ball in the air with power. Only time will tell whether he can keep them going at the same time.

The bat waggle is by far the most popular way to stay loose at the plate. Presumably that’s because waiting for a pitch is one of the few situations when it’s socially acceptable to waggle something. Life just doesn’t offer that many opportunities to waggle. Also, it’s a two-fer. It doesn’t just keep you loose; it also keeps your bat loose. It’s all well and good if you’re body’s ready to hit, but good luck trying to catch up to a Justin Verlander fastball with a tight bat. (Fun Fact: It turns out that bats — you know, the actual winged creatures — have their own waggle.)

But even after you waggle your bat, those last couple seconds are tricky. You’re locked into your batting stance, and now you’re just waiting there at the mercy of the pitcher (and the pitch clock). You’ve got to do something to maintain attack readiness. Some players bounce the bat off their shoulder, or bounce a little bit deeper into their crouch a few times. They rock back and forth, raise and lower their hands, or grind the toe of their cleat into the dirt. Some even make sure their pelvis is loose. Like, really loose. Like, very, extremely, possibly even dangerously loose.

That’s an entirely different kind of waggle. Read the rest of this entry »