Rockies Prospect RJ Petit Suffers Sprained UCL

Reliever sidelined indefinitely as team evaluates next steps

Published on Mar. 10, 2026

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Colorado Rockies pitching prospect RJ Petit has suffered a sprained UCL ligament in his right elbow, the team announced on Monday. The 26-year-old reliever will undergo further testing before a decision is made on his course of treatment.

Why it matters

Petit was a Rule 5 draft pick by the Rockies last year and was expected to compete for a spot in the team's bullpen this season. A significant elbow injury could derail his chances of making his MLB debut in 2026.

The details

The 6-foot-8 Petit was taken by the Tigers in the 14th round of the 2021 amateur draft and had a strong 2025 season in the minors, going 10-2 with a 2.44 ERA in 45 relief appearances across Double-A and Triple-A. He has yet to make his big-league debut.

  • The Rockies announced Petit's injury on Monday, March 10, 2026.

The players

RJ Petit

A 26-year-old pitching prospect in the Colorado Rockies organization who was selected in the Rule 5 draft last year.

Colorado Rockies

The Major League Baseball team based in Denver, Colorado.

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What’s next

The Rockies will evaluate Petit's injury and determine the best course of treatment, which could include surgery or rest and rehabilitation.

The takeaway

Petit's injury is a setback for the Rockies' pitching depth, as he was expected to compete for a bullpen spot this season. The team will have to explore other options to fill that role while Petit recovers.