The Rockies transferred Petit (elbow) to the 60-day injured list Thursday, Thomas Harding of MLB.com reports.

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.

The Rockies selected Bellozo's contract Thursday and optioned him to Triple-A Albuquerque, Thomas Harding of MLB.com reports.

Bellozo didn't make the cut for Colorado's Opening Day roster after giving up 11 earned runs in 15.2 Cactus League innings, but he will claim a spot on the team's 40-man roster. The 26-year-old right-hander owns a 4.20 ERA and 1.32 WHIP through 150 innings in his big-league career and could earn a spot in the Rockies' poor starting rotation if he returns to form in Triple-A. RJ Petit (elbow) was placed on the 60-day IL in a corresponding move.

The Rockies reassigned Bellozo to minor-league camp Monday.

After compiling a 4.65 ERA, 1.33 WHIP and 54:23 K:BB over 81.1 innings as a swingman for Miami in 2025, Bellozo didn't perform well enough in his first spring training with the Rockies to win a spot on the Opening Day roster as a starter or long reliever. He's expected to open the upcoming season at Triple-A Albuquerque.

Wheeler (shoulder) is scheduled to throw three innings and/or 50 pitches in Saturday's rehab start with Triple-A Lehigh Valley, Corey Seidman of PHLY Sports reports.

It will be Wheeler's first official game action since last September's venous thoracic outlet syndrome surgery. The Phillies will likely want Wheeler to get his pitch count up to the 80-to-90 range before clearing him for his season debut, so the right-hander will likely make two additional rehab starts after Saturday before returning in mid-April if all goes well.

Phillips will begin the season as part of the Marlins' bullpen, Christina De Nicola of MLB.com reports.

The 28-year-old righty produced a 1.13 ERA and 9:5 K:BB in eight innings this spring to secure his spot. Phillips figures to fill a middle-relief role after posting a 2.78 ERA, 1.15 WHIP and 52:24 K:BB over 77.2 innings last season with two wins, four saves and eight holds in 54 appearances for Miami.

The Padres placed Waldron (lower body) on the 15-day injured list Wednesday.

Waldron, who underwent hemorrhoid surgery in late February, is still in the process of getting built back up again and isn't expected to be ready to return from the IL until around mid-April at the earliest, per MLB.com. Waldron was able to pitch in two Cactus League games before the end of spring training, so he could be cleared to head out on a rehab assignment with Triple-A El Paso in the near future.

Webb (0-1) took the loss versus the Yankees on Wednesday, allowing seven runs (six earned) on nine hits and a walk while striking out seven over five innings.

Webb was roughed up for five runs in the second inning and gave up two more in the fifth before exiting the game. He threw 58 of 86 pitches for strikes, which was right in line with his workload in his last Cactus League start Thursday. The right-hander is a true workhorse for the Giants, having topped 200 innings in three straight years and 30 starts in each of the last four campaigns. He pitched to a 3.22 ERA, 1.24 WHIP and 224:46 K:BB over 207 innings in 2025 and should continue to eat innings with strong ratios again this season. Webb is tentatively projected to make his second start of the year on the road at San Diego next week.

Rea will make Chicago's Opening Day roster as a long reliever, Jordan Bastian of MLB.com reports.

With Cade Horton staking his claim to a rotation spot after an impressive rookie season and Edward Cabrera joining the Cubs via trade, Rea ultimately got pushed to the bullpen. The veteran righty made 27 starts for Chicago during the 2025 regular season, but he'll now slot in as a long reliever capable of supplying multiple innings out of the bullpen. Rea's fantasy value takes a hit in this role, though he certainly could still make some spot starts throughout the year.

San Diego placed Musgrove (elbow) on the 15-day injured list Wednesday.

After undergoing Tommy John surgery in October 2024, Musgrove missed the entire 2025 season but received full clearance ahead of spring training. However, after Musgrove experienced inflammation in his surgically repaired elbow following an exhibition versus Team Great Britain on March 4, the Padres have elected to tread carefully with the veteran righty. Musgrove has remained shut down from throwing for just over two weeks, but the San Diego brass has continued to downplay concern about his elbow issue, noting that some speed bumps were expected coming off the major surgery. While Musgrove is on the shelf, the Padres will turn to Walker Buehler to fill out their rotation.

The Padres placed Canning (Achilles) on the 15-day injured list Wednesday.

Canning is still on the mend from the season-ending Achilles surgery he underwent last summer, but he was cleared to face hitters in a simulated game March 20 and struck out three over a scoreless inning. A clearer timeline for his return will emerge while he builds his workload, though he could return to San Diego's rotation before the end of April.