Colorado Rockies

Willi Castro

2B

Castro has been on the injured list since Sept. 5 due to left heel plantar fasciitis and right knee soreness, and rather than attempting to ramp back up with the hope of playing in the final week and a half of the season, he's instead elected to shut himself down. After joining the Rockies on a two-year deal over the winter, the 29-year-old slashed .260/.331/.417 with 15 home runs, 10 stolen bases, 65 runs and 56 RBI in 120 games during his first season in Colorado.

Chase Dollander

SP

Although Dollander managed to avoid undergoing a full Tommy John procedure, the operation will still put an early end to his second MLB season. He showed significant improvement in 2026, turning in a 3.89 ERA and 1.30 WHIP alongside a 47:18 K:BB in 44 innings across 10 appearances (three starts). A clearer timeline for his return could emerge as the 2027 campaign approaches.

Welinton Herrera

RP

Colorado placed Herrera on the 15-day injured list Friday due to left elbow inflammation, but he was shifted to the 60-day IL just two days later after a follow-up MRI apparently revealed that the 22-year-old reliever was dealing with ligament damage. Schaeffer said that the Rockies don't currently have a timeline for Herrera to go under the knife, as the left-hander will presumably receive additional medical evaluations before deciding whether to get Tommy John surgery, an internal brace procedure or a hybrid of the two. Even if Herrera avoids a UCL reconstruction and instead has a UCL repair surgery, he's still likely to require close to a full year of rehab and recovery before returning to game action in the middle or second half of the 2027 season.

McCade Brown

SP

The Rockies have yet to officially confirm whether Brown was able to complete the next step in his throwing program, but at the very least, the report presumably indicates that the right-hander has already thrown off a mound without a hitter present in the batter's box. Brown has been on the mend from right shoulder inflammation since the early weeks of spring training, and given how long he's been shelved, he'll likely need to complete multiple live sessions before moving on to what will presumably be an extended minor-league rehab assignment. The 26-year-old has three minor-league options remaining and could be sent to Triple-A Albuquerque or Double-A Hartford once he's deemed ready to return from the 60-day injured list.

RJ Petit

RP

Petit will miss the entire 2026 campaign after undergoing Tommy John surgery with an internal brace on his right elbow last week. Valente Bellozo was selected to the 40-man roster and optioned to Triple-A Albuquerque in a corresponding move.