The Diamondbacks did things the “right way,” to the extent that the right way means anything. After making the World Series unexpectedly in 2023, they went into the offseason with an exciting group of hitters and an unsettled rotation, so they opened the vault and signed two of the top-10 free agents that year — Eduardo Rodriguez and Jordan Montgomery — both starting pitchers. When those two flamed out in 2024 but the hitters kept producing, they went back to the well and signed Corbin Burnes, another marquee option. They refused to include top starting prospects in trades. They already had Zac Gallen and Merrill Kelly in the fold. This is how you build a top rotation.

Er, well, this is a way that you can build a top rotation, but this particular iteration hasn’t panned out. In Phoenix, things are falling apart on the mound. Let’s look through Arizona’s problem rotation spots (read: everyone other than Kelly) and see if we can find a solution for each before it’s too late for the team’s 2025 season.

Corbin Burnes

The Problem: Injury
Burnes got off to a slow start in the desert, but like the weather in his new place of work, he was heating up as the year wore on. His cutter isn’t quite the devastating weapon it was during his 2021 Cy Young season, but it’s still a menace. He’s still one of the best in the business when it comes to spinning breaking balls. A well-located Burnes curveball is an absolute masterpiece, a pitch that will make you question the very basics of physics and reality.

In Burnes’ most recent four starts, he’s gone nuclear: 31% strikeout rate, 2.19 ERA, 2.67 FIP. He’d also been stacking up volume: Three of his past five starts lasted seven innings. But the most recent start ended prematurely in the fifth inning, when Burnes felt sharp tightness in his elbow, saw his velocity drop, and left the game. Burnes said after the game that he didn’t know the severity of the injury, telling reporters, “I’ve never had anything like it before, so I really have nothing to compare it to.”
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When the Diamondbacks signed Geraldo Perdomo to a four-year contract extension this past offseason, I understood why they wanted to keep him around. In a sport with plenty of jerks and grouches and tough hangs, Perdomo’s teammates say he’s a delight to be around. He’s Mr. “Say Hi to the Wife and Kids,” even if he’s not very good at finding your wife and kids in the stands.

But in terms of on-field production, I had my doubts. Perdomo was an average hitter in 2023 and 2024, and a competent defensive shortstop. He’d take a walk, but he wouldn’t hit for much power. He’s a terrific bunter, but if bunting is this high on a list of a player’s positive attributes, you start to worry he can’t do much else with his bat. Is a steady two-win player really the guy the Diamondbacks needed to lock up, with Zac Gallen and Merrill Kelly and Josh Naylor all in contract years? Especially with Jordan Lawlar on the verge of major league regular status?

What a fool I was to doubt Perdomo. He’s hitting .306/.402/.488 through 49 games. He’s already set a new career high in WAR (2.8, fifth among all position players) and tied his previous career high in home runs with six. Perdomo is also walking more than he strikes out; he’s perfect in 11 stolen base attempts, and his quality of contact is through the roof.

So what the heck has gotten into Geraldo Perdomo? Read the rest of this entry »

Welcome to another edition of Five Things I Liked (Or Didn’t Like) This Week. For once, I don’t have a fistful of double plays to show you. I don’t even have that many great catches. The baseball I watched this week was disjointed and messy, the regular season at its finest. Making the easy plays tough? We’ve got that. Bringing in your lefty to face their righty slugger? Got that too. Doubles that weren’t? Collisions between out-of-position players? Yes and yes. So thanks Zach Lowe for the wonderful article format, and let’s get started.

1. Tell ‘Em, Wash
I mean, how hard could first base be? Incredibly hard, of course. The Red Sox and Rangers are both on to their respective Plan Bs at first base after Triston Casas ruptured his patellar tendon and Jake Burger got sent down to Triple-A. No big deal defensively, right? Each team plugged in a utility player — Romy Gonzalez for Boston and Josh Smith for Texas — and moved on with life. Look how easy first is:

Read the rest of this entry »

Eugenio Suárez had himself a night. On Saturday at Chase Field against the Braves, the Diamondbacks third baseman homered four times, becoming the 19th player in major league history to do so in a single game. The fourth of those shots tied the score in the bottom of the ninth, but unfortunately for Suárez and Arizona, his incredible performance wasn’t enough. The D-backs lost in 10 innings, 8-7.

The 33-year-old Suárez is the first player to homer four times in a game since another Diamondback, J.D. Martinez, did so against the Dodgers on September 4, 2017. Suárez is just the third player ever to homer four times in a losing cause — it happened just once over a 128-year stretch — and only the second to make just four plate appearances in his four-homer game.

Read the rest of this entry »

Welcome to another edition of Five Things I Liked (Or Didn’t Like) This Week. Normally, this column is a celebration of the extreme athleticism and talent on display across the majors. This week, though, I found myself drawn to the oddities instead. Unhittable 98-mph splinkers? Boring. Let’s talk about a pitcher who can’t strike anyone out and yet still gets results. Some of the fastest human beings on the planet stealing bases? I’d prefer some slower, larger guys getting in on the act. Brilliant, unbelievable outfield catches? I was more fascinated by a play that didn’t get made. The only thing that hasn’t changed? Mike Trout still isn’t to be trifled with. So thanks to Zach Lowe of The Ringer for his incredible idea for a sports column, and let’s get down to business.

1. In-Game Adjustments
In the 15th year of his career, Mike Trout doesn’t stand out the way he did early on. He’s no longer the fastest and strongest player every time he takes the field; he’s more “slugging corner guy” than “perennial MVP frontrunner” these days. But one thing hasn’t changed: Trout’s wonderful ability to adapt.

Landen Roupp faced the Angels last Saturday, and he leaned on his curveball. He always does, to be fair. It’s one of the best curveballs in baseball, with enormous two-plane break, and he throws it 40% of the time, more than any of his other pitches. In fact, he throws his curveball more often than any other starting pitcher. Trout had never faced Roupp before, and so he struggled to deal with the signature offering.
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Shelby Miller is so old… (“How old is he?”)… he got R.A. Dickey to ground out in his first major league inning. He’s so old he threw more than 200 innings for the Braves when they were bad. He’s so old he threw more than 200 innings in a single season, full stop.

I guess 34 isn’t that old, but Miller has lived and died a hundred times during his career in professional baseball, and if the first eight appearances of his second go-around with the Diamondbacks are any indication (10 innings, 10 strikeouts, only four total baserunners), he’s back to life again. Read the rest of this entry »

Max Scherzer has had a Hall of Fame-quality career. Now with the Toronto Blue Jays, the 40-year-old right-hander has accumulated 73.0 WAR to go with 216 wins and a 133 ERA+ across his 18 big league seasons. Moreover, his 3,408 strikeouts rank 11th all time, and his résumé also includes three Cy Young Awards, eight All-Star selections, and a pair of World Series rings. Writing about his Cooperstown chances last summer, my esteemed colleague Jay Jaffe called Scherzer “a lock for election.”

Let’s turn the clock back to 2007, when Scherzer made his professional debut that summer a full year after he was drafted 11th overall by the Arizona Diamondbacks out of the University of Missouri. The following spring, Scherzer was ranked fourth in the D-backs system when Baseball America’s 2008 Prospect Handbook was published. Rankings and in-depth scouting reports weren’t yet a thing here at FanGraphs.

What did Scherzer’s 2008 Baseball America scouting report look like? Moreover, what does he think of it all these years later? Wanting to find out, I shared some of what BA’s Will Lingo wrote and asked Scherzer to respond to it.

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“The 11th overall pick in 2006, Scherzer pitched for the independent Fort Worth Cats and held out before he would have reentered the draft pool.”

“That’s right,” replied Scherzer. “Now that you think about it, the rules have changed since then, but when I got drafted by the Diamondbacks… actually, let’s go back to pre-draft. That season, my junior year, I slammed a door on my finger. I tried to pitch through it and developed biceps tendonitis. That scared off a lot of teams.

“I came back at the end of the year and pitched well, so I went into the draft saying that I was still looking for a top-college-pitcher contract. That was when you could still sign major league contracts out of the draft, and it’s what I told teams I was looking for. Arizona drafted me under those pretenses, but then tried to tell me I was hurt. I was like, ‘You guys literally just saw me at the Big 12 tournament. Everything is back. I’m good.’ I let them know that I wasn’t going to take 11th-pick slot; I was looking for a major league contract, which is what the top college pitchers in the past few years had gotten. Read the rest of this entry »

Randal Grichuk was ranked seventh when our 2015 St. Louis Cardinals Top Prospects list was published in March of that year. Acquired by the NL Central club in trade 16 months earlier, the then-22-year-old outfielder had been drafted 24th overall by the Los Angeles Angels out of a Rosenberg, Texas high school in 2009. The selection is a well-known part of his story. Grichuk was the first of back-to-back Angels’ picks that summer, the second being Mike Trout.

Grichuk has gone on to have a good career. Now in his 13th major league season, and his second with the Arizona Diamondbacks, the right-handed-hitting slugger has propelled 203 home runs while logging a 102 wRC+. Moreover, none of the 23 players drafted in front of him (in what was admittedly a pitcher-heavy first round) have homered as many times, nor have they recorded as many hits. AJ Pollock is the only position player with a higher WAR.

What did Grichuk’s 2015 scouting report look like? Moreover, what does he think of it a full decade later? Wanting to find out, I shared some of what our then-lead prospect analyst Kiley McDaniel wrote, and asked Grichuk to respond to it.

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“Grichuk was the Angels first rounder that they took one pick ahead of Mike Trout in 2009, though Grichuk has turned into a solid prospect in his own right.”

“That’s accurate,” replied Grichuk. “I was taken one pick before Trout, and I played well enough in the minor leagues to be looked at as a prospect.”

“They inexplicably basically gave Grichuk away in the Peter Bourjos–David Freese deal in 2013, and now Grichuk is knocking on the door.” Read the rest of this entry »

Spring is a time of batting stance changes. As players come back from their offseason workouts and sessions with their private hitting coaches, they may have new setups and mechanics that they believe will make them better hitters in the year ahead. Typically, we can notice stance changes right away, but throughout spring training and the first few weeks of the regular season, it can be difficult to determine whether an alteration will have any real impact on a player’s performance. A lot of times, a change can be noise, so filtering through why it was made is critical to understanding its eventual effectiveness. I approach this by thinking about a hitter’s weakness and how the change might address it. In the case of Corbin Carroll, there is a straightforward story to be told that makes me confident his new stance will be impactful in the long term.

Before we get into why Carroll changed his stance from a data perspective, let’s discuss his reasoning behind the change and what it looks like, much of which was reported on during spring training. As Carroll told Alex Weiner of Arizona Sports, his intention with the stance change was to “have a better hand position to fire from.” Carroll has been tweaking his hand position since the second half of last season, but where his hands are now versus then is different, as you can see below in this side-by-side screenshot posted by DBacks Dispatch:

Corbin Carroll has changed his batting stance in spring, he’s brought down his arms and has crouched in a little more pic.twitter.com/MVihuS5I2x

— DBacks Dispatch (@DbacksDispatch) February 24, 2025

My main focus is how he’s shifted his hands forward, closer to his face than they were even after he made his tweak last summer. That change alone puts him in a much different position before his downswing, and therefore, sets him up for a different bat path. Let’s get into why. Read the rest of this entry »

You lose some, and then you lose some. On Sunday at Oracle Park, the Mariners not only fell to the Giants 5-4, but they were forced to remove Victor Robles from the game after he injured his left shoulder making a remarkable catch on the game’s penultimate pitch. His injury is just one of a handful of notable ones suffered in the past several days.

Robles, who broke out last season after being released by the Nationals and signed by the Mariners, had played every inning of every game in right field until the injury. With the score tied 4-4 in the bottom of the ninth, one out, and Luis Matos on first base, Patrick Bailey fouled a drive into the right field corner. Robles sprinted 113 feet, leapt to grab the ball, and then fell over the half-height padded fence and into the netting. After extricating himself, he fell to his knees in obvious pain, rolled the ball to second baseman Ryan Bliss as Matos tagged up and reached third base, and remained on the ground. While he was tended to by Mariners head athletic trainer Kyle Torgerson, Giants manager Bob Melvin challenged the catch ruling, but the call on the field was upheld [as a reader pointed out, Matos was sent back to second under stadium boundary rules]. Finally, Robles was carted off the field, with Torgerson helping him to support his injured left arm.

Miles Mastrobuoni moved from third base to right field to replace Robles, but he didn’t need to for very long, because on the next pitch after play resumed, Wilmer Flores singled in Matos to send the Mariners to defeat, dropping them to 3-7. Medical personnel at Oracle Park popped Robles’ shoulder back into place, and after undergoing X-rays on-site, he was initially diagnosed with a dislocated left shoulder and placed on the 10-day injured list. The results of the follow-up MRI he underwent on Monday afternoon have yet to be announced. Read the rest of this entry »