Diamondbacks left-hander Jordan Montgomery says he will be having Tommy John surgery next week, per Nick Piecoro of the Arizona Republic. He will therefore miss the 2025 season and likely a notable chunk of 2026 as well.
The out-of-nowhere news is a brutal development for the lefty. The past year-plus have already been a challenging time for him and now he’s slated for another year-plus of rehab before he can improve his trajectory.
The southpaw already had Tommy John surgery once, in June 2018. He missed the latter half of that season and most of 2019. He then had a subpar showing in 2020. He stabilized things for a three-year stretch after that. From 2021 to 2023, he made 94 starts and logged 524 1/3 innings. He had a 3.48 earned run average, 22.5% strikeout rate, 6.2% walk rate and 44.5% ground ball rate. FanGraphs considered him to be worth 10.3 wins above replacement for that span. He was a key part of the 2023 Rangers team that won the World Series, tossing 31 innings that postseason with a 2.90 ERA.
He hit free agency after getting that ring and seemed poised for a strong nine-figure contract, but that didn’t come to pass. The 2023-24 offseason was rough for most free agent, with the so-called “Boras Four” becoming the poster children for the chilly winter. Scott Boras clients Montgomery, Blake Snell, Matt Chapman and Cody Bellinger all lingered unsigned into the spring. Each eventually signed a short-term deal that fell well below initial expectations.
In Montgomery’s case, he agreed with the Diamondbacks late in March. It was a one-year, $25M guarantee, though with an easy path to extra earning power. He could vest a $20M player option with just 10 starts and bump the value to $22.5M with 18 starts and $25M with 23 starts.
After missing the start of the season due to his late signing, he never got on track and eventually got bumped to the bullpen. He made 21 starts and four relief appearances, finishing the year with a 6.23 ERA in 117 innings. The club finished 89-73, tied with the Mets and Braves, but those two clubs took the final wild-card spots via tiebreakers.
In early October, fresh off the sting of just barely missing the playoffs, club owner Ken Kendrick publicly expressed frustration with the Montgomery signing.
“Looking back, in hindsight, a horrible decision to have invested that money in a guy that performed as poorly as he did,” Kendrick said. “It’s our biggest mistake this season from a talent standpoint. And I’m the perpetrator of that.”
While he pointed the finger at himself for suggesting the front office pursue him, it was nonetheless surprising to see an owner publicly roast one of his own players in such a manner.
Despite that apparent tension, Montgomery wasn’t going to walk away from $22.5M after the season he had. He exercised his player option for the 2025 campaign. That led to a full winter of trade speculation. The Diamondbacks didn’t need him in the rotation, especially after Arizona native Corbin Burnes agreed to sign there. That gave them a projected starting group of Burnes, Zac Gallen, Merrill Kelly, Eduardo Rodríguez, Brandon Pfaadt and Ryne Nelson.
But Montgomery stayed with Arizona throughout the offseason. Just in the past week, there were some reports of ongoing trade talks. The lefty just pitched a spring game on March 19, less than a week ago. Given the injuries to other pitchers around the league, there seemed to be at least some chance to a club swinging a deal for Montgomery just before Opening Day. That’s obviously off the table now.
For Montgomery, he was surely hoping to engineer a bounceback season in 2025 before returning to the open market. His last foray into free agency didn’t go as planned, enough that he changed his representation and later accused Boras of having “butchered” his case. But he’ll instead go into the 2025-26 offseason still recovering from this surgery. At that point, he’ll likely be looking for a one-year “prove it” deal or perhaps a backloaded two-year pact covering the 2026-27 seasons. He’ll turn 33 years old this December.
For the Diamondbacks, they were also hoping for Montgomery to get things back on track, if only for the cost savings. Per recent reporting, they asked at least one club to take on $13M of the $22.5M still owed to the lefty. That was a tall ask but perhaps a strong early-season performance from the lefty could have increased his appeal around the league. Now the club will have no chance of moving any of that money.
The one silver lining is that this clarifies some roster things. Montgomery will be put on the 60-day injured list, giving them an extra 40-man spot to work with. It also crystallizes their rotation plans a bit, since they can just wipe Montgomery off the board. Even without him, they still have six guys for five rotation spots, which perhaps leaves Nelson to work a long relief role until a spot opens up for him.
