Tigers Just Got Back A Bullpen Arm Worth Watching

The Tigers have reclaimed promising pitcher RJ Petit from the Rockies after his stint as their first overall Rule 5 draft pick, paving the way for his recovery and a potential role in Detroit's bullpen.

The Tigers got a piece of business back on Monday that looked gone for good a year ago.

Right-hander RJ Petit, the first player taken in the 2025 Rule 5 draft, has been returned to Detroit after the Rockies chose not to keep him on their roster through another round of 40-man roster decisions. Colorado announced, “The Rockies have returned 2025 Rule 5 pick RHP RJ Petit to the Detroit Tigers.”

Petit had been with the Rockies for almost exactly a year after leaving the Tigers as their No. 30 prospect and arriving in Colorado at No. 26. He threw four innings in spring training, but the Rockies revealed before Opening Day that he was dealing with Tommy John surgery and would miss the 2026 season.

That injury made the roster call a tricky one, but not an impossible one. Once the Rockies moved Petit back from the 60-day injured list on Monday, they had to decide whether to keep him or cut him loose. They went with the latter, and Detroit now gets him back in its system.

Petit’s path to the Rule 5 draft was a steady climb. The Tigers selected him in the 14th round in 2021, and he was in Triple-A late in the 2025 season after posting a 2.44 ERA over 66 1/3 innings between Erie and Toledo. That performance made him an appealing pick for Colorado, which had also just brought in longtime Tigers pitching director Gabe Ribas as an assistant pitching coach.

The move back to Detroit also fits the reality of the Rockies’ roster squeeze. They currently have 36 players on their 40-man roster, and Petit was the kind of arm they could not easily stash while he recovered.

Before the Rule 5 draft, Petit had been turning heads inside the Tigers’ organization. In May, he was named Detroit’s hottest minor league pitcher after not allowing a run out of the SeaWolves’ bullpen from April 30 through June 4, a stretch that covered 15 2/3 innings. He was up to Triple-A by July 22.

What happens next is still a long way off, especially after Tommy John, but Petit’s return gives Detroit a chance to keep working with him through rehab. Pitchers often look different after that surgery, yet it’s not hard to see a bullpen role for him down the line. Scott Harris has put a clear emphasis on building the relief corps with internal options, and Petit could fit as a seventh- or eighth-inning arm.

He doesn’t project as a future closer - that job will probably belong to Drew Sommers - and his minor league track record backs that up, with 14 saves and 24 holds. Will Vest appears best suited for the eighth inning, while Kyle Finnegan should probably be ruled out of all high-leverage situations for the forseeable future.

For now, though, the big takeaway is simple: the Tigers got Petit back, and that’s a welcome surprise for the front office.

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