Last week, what felt like months of Pablo López trade rumors finally came to fruition, as he was sent to Minnesota (along with two prospects) for reigning batting champion Luis Arraez. (For an in-depth breakdown of the trade, check out Ben Clemens’ summary here.) In theory, the trade should help both rosters: the Twins needed pitching depth, and the Marlins needed offensive help. For this piece, I’m going to focus on how López can recover the best version of himself that we saw in 2021 before he missed much of that season’s second half.

López established himself as an above-average starting pitcher in the shortened 2020 season, when he threw 57.1 innings with a 3.61 ERA and 3.09 FIP. The main reason for his success: he bought into the idea of throwing your best pitches more often, throwing his four-seamer and changeup over 60% of the time for the first time in his career. That success carried over into 2021, when he threw 102.2 innings with a 3.07 ERA and 3.29 FIP, followed by a hot start to 2022. But from the middle of June through the rest of the season, he kept tossing up clunkers.

The short story is that hitters stopped whiffing at López’s changeup. He had a slight recovery in the final month, but as you can see in that pitch’s whiff rate and his strikeout rate, that wasn’t him at his best. His repertoire hinges on both righties and lefties swinging at and whiffing on changeups. It’s the key to his success, and it will need to be the focus if he hopes to return to his 2021 form.

So why did hitters swing and miss less at López’s changeup as the season went on, and is it directly related to the pitch itself?

To answer that, it’s worth considering first what a changeup is: a deception. And in order to deceive, you have to make the hitter believe something else is coming. To do that, you must throw your complimentary pitch regularly and in an ideal location. In the case of the changeup, you usually pair it with a four-seamer or sinker; for López, it’s the four-seamer. The success of those pitches goes hand in hand; if one is off, then the performance of the other could be in jeopardy. To go into more detail: if the shape of one changes and no longer tunnels as well with the other, then the combination isn’t as deceptive.

That seems to have been the case with López. Below is a table of his four-seamer/changeup metrics from the last few seasons:

The difference is jarring. López didn’t have pure backspin on his four-seamer to begin with, but a change in shape from the low-80s in Active% (also known as spin efficiency) to 66.2% completely alters a pitch’s shape and, as a result, its effectiveness. Even though his changeup metrics were relatively the same from 2021, the change in the fastball negatively impacted the entire arsenal. If a hitter can distinguish between those two pitches because of shape and/or location, they are less likely to be fooled by either one.

This negative development for López can be traced directly to an injury suffered when he took a liner right off the right wrist on June 10. After that, his performance was sporadic, and more importantly, his release point and pitch location changed:

During his rough patch in July and August, his release point moved down and closer to third base. This slight change perfectly tracks with a loss in active spin. By getting further around the ball, your finger and seam orientation at release are less on top of the ball and more on the side. To get more backspin, you ideally release the ball closer to the top of your fingertips. A change in grip strength that could be the result of a wrist contusion would have a direct impact on these components and cause compensations that take time to realize and adjust to. And while López felt healthy enough to throw 180 innings last year, that doesn’t mean he wasn’t compensating.

When combing through the video, it’s easier to see the change in release. Below are four total clips; the first two are from April, and the two after are from July and August.

There are a few things I want to address. First, López’s altered release point can be traced back in his delivery to a slight change in the use of his glove side. Comparing his throws in the spring to those in the summer, you can see that he’s altered the way he turns his glove over at peak lead arm extension. Early in the year, he only had a slight quarter turn in his glove; in the second half, he progressed into a full turnover.

That subtle difference creates two different reciprocal movements. A reciprocal movement is one that is a direct result of another; if you throw a ball up, it must come down. The same principle works for the body. A change in direction of the glove turn affects the direction of torso rotation, which then affects the angle or position of the throwing arm at release. (The kinetic chain!) That’s an area where he and his coaches can look at when discussing how he can make the proper mechanical adjustments to recover his fastball shape.

It’s important, too, to note how important that recovery will be for López’s tertiary pitches as well. When you lose one of your primaries, hitters can more easily sit on the pitches that aren’t as effective in the arsenal. For López, that pitch was his cutter. After two seasons with a wOBA under .325, the pitch was wrecked in 2022: a .447 wOBA and .321 batting average against. Its downfall can also be traced to his four-seamer, as the pitch went from the mid-50s in spin efficiency to the mid-30s. He may only throw it 10% of the time, but it was still a huge liability. Hopefully whatever mechanical adjustments López makes to recover his four-seamer can filter down to that pitch as well.

Injuries in general can be tough to overcome in the middle of a season. For a pitcher, that difficulty increases with anything related to their arm. A contusion may not be a long-term health concern, but López’s second half shows how something that looks insignificant can lead to detrimental short-term compensations. Luckily for him, this is the type of thing that shouldn’t take any drastic adjustments to fix, and he already has a blueprint for success from his 2020 and ’21 campaigns. With the help of a new coaching staff in 2023, his two-pitch combo should give him and the Twins an above-average starter for the next couple of seasons.

Hello, and welcome to today’s episode of Twins Trade Talk. I’m your host, Ben Clemens, ostensibly a writer at FanGraphs but now an exclusive chronicler of Twin City swaps. Last week, Minnesota traded AL batting champion Luis Arraez in a deal I absolutely loved. If that’s the main course, Monday’s move was dessert:

The Twins are acquiring OF Michael A. Taylor from the Royals for LHP Evan Sisk and RHP Steven Cruz, per source.

— Mark Feinsand (@Feinsand) January 23, 2023

Let’s start here: I love this trade for both sides. Michael A. Taylor has been a quality contributor when healthy for much of his career, and his last two seasons in Kansas City encapsulate his career well. In a sentence: very good outfield defense is valuable. Taylor hit a paltry .249/.304/.357 in blue and gold, but he was still worth 3.5 WAR (by our calculation, 5.7 per Baseball Reference) over roughly 1,000 plate appearances because he’s one of the best outfield defenders around. Depending on which defensive metric you’re most fond of, he’s either first (DRS), first (UZR), or second by one run (OAA) among all outfielders over the past two years. Read the rest of this entry »

Here’s something Joey Votto said while serving as a guest commentator in the Cincinnati broadcast booth in August: “The best in the game are matching the style of the game. The style of the game changes.” He was talking about hitting, but his point lined up with one of my favorite baseball metaphors. I often think of the game as an ecosystem. The players who thrive are the ones who are either built for or can adapt to the current game; changes to the style or the rules will always favor some players at the expense of others.

Changes will also favor some plays over others. As the infield shift rose to prominence, routine groundouts to shallow right field were fruitful and multiplied. Now that the shift has been outlawed, they’ll likely be pushed to the brink of extinction, and they’re taking one of baseball’s most exciting plays with them.

FanGraphs loves bunt doubles. This is a brief history of the bunt double by Jake Mailhot. This is a how-to manual for bunt doubles by the sainted Jeff Sullivan. In fact, he wrote about bunt doubles kind of a lot. As the shifting ecosystem means that bunt doubles are likely going the way of the dodo, it’s time to write the final chapter of their story. Read the rest of this entry »

I think I might be on to something. While fiddling around with some 2022 batted ball data in an attempt to improve my programming skills, I created a list of players whose 95th-percentile exit velocity most outstripped their average exit velocity. If you want that in plain English, that’s players who hit the snot out of the ball when they connect, but whose average exit velocity is weighed down by a pile of mishits. Second on this list among players with at least 200 batted balls? Oneil Cruz, a poster child for cartoonish maximums and frequent contact issues.

With Cruz coming in near the top of this list, I thought I might have a bead on something cool. Jo Adell (only 162 batted balls, but still), Michael Harris II, and Pete Alonso are all high up there, and they’re the kind of players I would expect to see. They’re also interesting players from a breakout perspective; if something clicks and they start making more consistent contact, they could turn into monster hitters overnight.

That’s unfair to Alonso, who is already a monster hitter, but there’s even some instructive value there. Alonso and Mookie Betts had strikingly similar lines in 2022 by strikeout rate, walk rate, isolated power, BABIP, and wRC+:

One category where they weren’t similar? Alonso’s top end exit velocity is far superior to Betts’s. I mean, obviously. Have you seen Mookie Betts? Have you seen Pete Alonso? If Alonso were getting to his power as often as Betts gets to his, he’d be putting up Yordan Alvarez numbers. Indeed, Alvarez and Alonso have nearly identical 95th-percentile exit velocities, but Alvarez hits the ball 5.5 mph harder on average. He’s consistently hitting the ball on the screws, in other words. No wonder, then, that he posted an isolated power 60 points higher than Alonso. Read the rest of this entry »

I am, it brings me great shame to admit, an inveterate procrastinator. Last summer, the air conditioning in my car stopped working, and instead of taking it in to get fixed, I just waited until the weather cooled off and look, now I don’t have to worry about it all winter.

Perhaps you’re the same way. Perhaps you’re the same way and you run the baseball ops department of one of the 30 MLB teams. Need an outfielder? Eh, we’ll figure that out later. Bryce Harper signed his megadeal in March, for cryin’ out loud. There will always be help left on the market, one might reasonably infer.

But that’s not really the case anymore. Two things struck me when I was writing up the Tommy Pham signing last week. First, very few teams only need three competent outfielders. Even the Mets, who signed veteran starters to long-term contracts at all three positions, still had enough of a hole in the lineup to warrant going out to get a top-notch fourth outfielder/platoon DH.

Second, Pham was one of the last good options on the board. Read the rest of this entry »

Last season was a fun one for the Baltimore Orioles. Coming off of five straight sub-.500 seasons and a particularly torturous 110-loss campaign, the Birds had a 24-35 record before starting to turn things around in late June. Just before the All-Star break, they went on an improbable 10-game winning streak to jump over .500, and after the break, they kept the momentum moving their way, even making a short-lived run at the third American League Wild Card spot (they ultimately fell just three games short). It started to look like the dawn of a new era in Baltimore, and much of the spark came from a revamped lineup. Adley Rutschman and Gunnar Henderson made their highly anticipated big league debuts and did not disappoint – particularly the former, who turned in one of the finest rookie seasons by a catcher in recent memory. Cedric Mullins followed up his breakout 2021 with another solid season. Anthony Santander set a new career high with a team-leading 33 home runs. And then there was Ryan Mountcastle.

After leading the Orioles with 33 homers and 89 RBI in 2021 in his full-season debut, Mountcastle’s offensive production faded last season. He hit just 22 home runs, while his slugging dropped from .487 to .423, his wOBA from .335 to .316, and his wRC+ from 111 to 106. His defense improved enough to allow him to reach 1.6 WAR, a new career high, but for a player whose calling card is power, his waning surface-level thump was at least indicative of a sophomore slump and at most a cause for concern.

But Mountcastle’s Statcast profile and expected stats tell an entirely different story. In 2021, the slugger was in the middle of the pack, with an average exit velocity of 89.1 mph (45th percentile) and a 39.7% hard-hit rate (41st); his .245 xBA and .326 xwOBA placed him in the 36th and 47th percentiles, respectively. By these measures, his 2022 was one of the better year-over-year improvements in baseball. He added 2.2 mph to his average exit velocity, the seventh-largest increase among players who qualified in both years, and 6.6 percentage points to his hard-hit rate, the sixth-most in that group. Just four hitters added more to their xBAs than his .032 points, and the only hitters who managed to improve their xwOBAs more than his .036-point jump were Yordan Alvarez (.073), Christian Walker (.048), and Aaron Judge (.045). His was one of just 40 player-seasons in the Statcast era with 60-plus barrels. Read the rest of this entry »

Last week, I wrote about the handful of pitchers who drop their release points significantly when facing same-sided batters. Today I’m going to highlight a few who change their release points by a different method. Before we get to them, I’d like to talk a bit about why anybody would risk messing with their release point in the first place. This is an article about the potentially transformative power of scooching over.

I started thinking about arm angles with a very blunt test. For the last seven years, I pulled every pitcher’s average release point and their wOBA against lefties and righties, then calculated the correlation between them. I also pulled average velocity as a control variable of sorts. The correlation coefficients are small, but they line up with what we’d expect:

Unsurprisingly, it’s always good to throw the ball hard. Against same-sided batters, pitchers who release the ball lower and wider fare better. Against opposite batters, a wide release point is associated with poor results. Read the rest of this entry »

Friday’s trade that saw Pablo López and a pair of prospects go from Miami to Minnesota in exchange for Luis Arraez made sense for both teams. The Twins, who my colleague Ben Clemens wrote got the better of the deal, received a quality pitcher who will slot into their starting rotation, plus the promising-but-raw minor-leaguers. The Marlins got a 25-year-old infielder who just won a batting title and is a .314/.374/.410 hitter over 1,569 big-league plate appearances.

Miami’s top prospect is a big reason why parting with a pitcher of López’s quality is perfectly defensible. While recently-signed Johnny Cueto will take Lopez’s rotation spot in the near term, it is Eury Pérez who promises to make an already-good rotation even better. Arguably the best right-handed pitching prospect in the game — Baltimore’s Grayson Rodriguez and Philadelphia’s Andrew Painter are also on the short-list — Pérez has a Sandy Alcántara-ish ceiling. The 6-foot-8 native of Santiago, Dominican Republic excelled in Double-A this past year as a teenager, and there is a real chance that he’ll reach the big leagues at age 20.

“This kid just has an incredible presence about him,” said Miami GM Kim Ng. “His fastball is 96-99 [mph] with ride, and he’s got a really good breaking ball. And again, the presence, as well as the poise, is unbelievable. He’s not talented beyond imagination, but it’s close.”

Asked who the youngster comps to, Ng initially demurred. As she pointed out, not many pitching prospects are Pérez’s size. When she did ultimately offer a name, it was a notable one. Read the rest of this entry »

Trades aren’t inevitable. We hear rumors of some player being on the block all the time. Sometimes, that ends in an actual trade. Frequently, though, it ends in nothing: some team shops a mystery player around, no one bites, and then everyone goes about their business as if the initial trade rumor never happened. But sometimes the rumors are just so strong that they’re bound to come true eventually. To pick a name at random (note: not random), the Marlins have reportedly been looking to trade Pablo López for eons. They can’t hit, they have plenty of starting pitchers, and López seems like the best trade option when considering the combination of potential return and expendability.

Likewise, Luis Arraez has intermittently been the subject of trade speculation. He’s a good hitter and versatile defender, but the Twins have enough infielders that they’ve been reduced to playing the 5-foot-10 (generously) Arraez at first base. When Carlos Correa returned to the fold, it looked like another year of Arraez at first base, so it didn’t take a rocket scientist to surmise that the Twins might look to move an infielder. They needed pitching. The Marlins needed hitting and crave contact ability. What happens when an unstoppable force meets an exceedingly movable object? The trade that had to happen, of course.

As Jeff Passan reported, Luis Arraez is now a Marlin after the Twins traded him for López and two prospects: Jose Salas and Byron Chourio. Both Arraez and López are the kind of player that smart front offices love to build around. They have multiple years of team control remaining at below-market rates thanks to the arbitration process. They’re both borderline All-Stars, and both have utility on more or less any team — Arraez because of his versatility and López because everyone needs pitching. Players like these two form the backbone of every sustainable winner, so it’s no surprise that each team demanded such a player when trading one away. Read the rest of this entry »

Owen Caissie has a high ceiling and a long way to go to reach it. Acquired by the Chicago Cubs from the San Diego Padres as part of the December 2020 Yu Darvish deal, the left-handed-hitting outfielder is 20 years old and has just 159 professional games under his belt. Moreover, he was drafted out of cold-weather Burlington, Ontario. As Eric Longenhagen noted when ranking the 2020 second-rounder No. 3 on last year’s Cubs Top Prospects list (and just outside of our overall Top 100), Caissie “had never played a night game in his life until the Arizona Complex League opener in 2021.”

Looking mostly at the raw numbers, Caissie’s future looks less sunny than it did prior to last season. Playing in High-A South Bend, he slashed an uninspiring .254/.349/.402 with 11 home runs in 433 plate appearances, and that was followed by an even more lackluster .220/.270/.356 line in the Arizona Fall League. Perspective is needed; Caissie was a teenager for the first half of the season, and his tools, originally crafted in Canada, are both projectable and loud. He simply remains relatively raw.

Caissie, who is listed at 6-foot-4, 190 pounds, discussed his early-career development during his stint in the AFL.

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David Laurila: Let’s start with your development as a hitter. How have you evolved since entering pro ball?

Owen Caissie: “I feel like what has changed the most is… I mean, I did make some swing adjustments. When I got drafted, I was kind of bent down, and now I’m straight up. But what’s really changed is my approach, my pitch selection, my ability to kind of keyhole the ball in the middle. I’ve never read my scouting report. I wouldn’t even know how to get to it. But there are obviously holes in my game that I need to close up.”

Laurila: What type of hitter do you consider yourself?

Caissie: “I like to classify myself as a hitter over a power hitter. At least that’s what I try to be.” Read the rest of this entry »