Herget spent time on the paternity list in late April, and he's now going to be away from the team again while dealing with a personal matter. The parameters of the bereavement list required Herget to miss at least three, and no more than seven, games. Seth Halvorsen was called up from Triple-A Albuquerque in a corresponding move to fill Herget's spot in Colorado's bullpen.

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.

Brown has been dealing with right shoulder inflammation since the beginning of spring camp, and his move to the 60-day IL will officially keep him on the sidelines until at least May 24. Sammy Peralta was claimed off waivers from the Brewers to fill the open spot on the 40-man roster.

Castillo received an invitation to big-league spring training, but the lat injury will likely end his longshot bid to win a spot on the Rockies' Opening Day bullpen. The 25-year-old righty split the 2025 campaign between Triple-A Albuquerque and Double-A Hartford, posting a 2.94 ERA and 64:27 K:BB in 52 innings.

Ohl underwent season-ending Tommy John surgery in late February. If the Rockies bring him back as a reliever, he has a chance to be ready in time for the start of next season.

The 34-year-old is dealing with a lumbar degenerative disc disease and has played a combined 170 games across four seasons since inking a seven-year, $182 million contract with Colorado. Bryant was placed on the 60-day injured list last week, and there's been no indicate of when, or if, he'll be able to retake the field.

Williams suffered the injury last month and will need some down time before ramping things back up. The 22-year-old had been on the Rockies' list of non-roster invitees, but it sounds like the injury put the kibosh on that. Williams posted a 7.08 ERA over 23 starts at Double-A Hartford in 2023.

The report doesn't provide any specifics regarding when Thomas had his surgery, making it difficult to project when he might be ready for game action. One of the top prospects in the Colorado organization, the 22-year-old outfielder split time between High-A Spokane and Double-A Hartford in 2025 and slashed .300/.398/.452 with 14 home runs and 33 stolen bases over 533 plate appearances.

Criswell missed the entire 2025 season after undergoing Tommy John surgery March 14, 2025, but the right-hander appears to be nearing the finish line in his long recovery process. Because the Rockies placed him on the 60-day injured list prior to Opening Day, Criswell won't be eligible for activation until late May, so he'll likely use most of his 30-day rehab window in the minors to knock off rust. Expect Criswell to eventually move his assignment to Double-A Hartford and/or Triple-A Albuquerque.

Feltner had previously stated he didn't believe he'd need a rehab assignment, but manager Warren Schaeffer suggested otherwise Wednesday. Feltner is still on track to return at some point in May, though it could be later in the month than originally anticipated.