Colorado

Rockies

Castellano was shipped back to the Phillies last spring after the Twins made him the ninth overall pick in the offseason Rule 5 Draft. The 24-year-old reliever posted a pedestrian 5.14 ERA (4.18 FIP) and 24.2 percent strikeout rate over 35 innings over 20 appearances for Double-A Reading last season. He’s a low-risk dice roll for Colorado’s new-look front office.

Romo has some prospect pedigree, but hasn’t hit nearly enough to suggest he’s more than a backup backstop at the highest level. The 24-year-old will likely compete for that job this spring in the Grapefruit League.

Molina is one of two new Atlanta hurlers, as the team also snatched Osvaldo Bido off waivers from the Athletics. Molina is only 23, and while he has not had any real success at the highest level, he’ll get a chance to prove he’s more than organizational depth this spring — assuming he sticks on the 40-man roster, of course.

Byrnes will serve under president of baseball operations Paul DePodesta. The 55-year-old Byrnes has been the Dodgers’ senior vice president of baseball operations since 2014, but he was previously the general manager for the Diamondbacks from 2005-2010 and then for the Padres from 2011-2014. His primary responsibilities for the Dodgers included supervising the team’s scouting and player development, so his experience will be leaned on heavily as the Rockies try to turn their organization around.

Brebbia bolsters Colorado’s bullpen depth heading into next spring after making 22 relief appearances between the Tigers and Braves last season, finishing with a bloated 7.71 ERA across 23 1/3 innings of work. The 35-year-old journeyman has made 376 appearances in the big leagues dating back to 2017.

Lopez fortifies Colorado’s infield depth and will compete for a bench role as a defensive specialist in spring training after spending most of last season at the Triple-A level, hitting .267/.303/.317 with zero homers and seven steals across 70 games. The light-hitting 30-year-old got into 18 games between the Cubs and Angels this past season, going just 1-for-24 at the dish. He’s merely emergency organizational depth at this stage of his career.

Castillo did a nice job in 41 appearances between Double-A Hartford and Triple-A Albuquerque in 2025, compiling a 2.94 ERA, 1.17 WHIP and a 64/27 K/BB ratio across 52 innings of work. With a strong showing in Cactus League action, it’s possible that the 25-year-old hurler could push for a spot in the Rockies’ Opening Day bullpen.

The 27-year-old left-hander spent the past two seasons in the Marlins’ organization. In 2025, he compiled a 4.11 ERA, 1.38 WHIP and a 75/32 K/BB ratio over 85 1/3 innings in 27 appearances (19 starts) between Double-A Pensacola and Triple-A Jacksonville. He’ll add pitching depth for the Rockies.

Mushinski is a longtime Astros prospect who had a 5.45 ERA in 33 major league innings from 2022-24. He made his way to the Guardians system last season and had a 3.78 ERA and a 66/33 K/BB in 50 innings out of the bullpen for Triple-A Columbus. He should have a chance to compete for a bullpen spot in spring training.

Schaeffer replaced Bud Black in May and led the team to a 36-86 record the rest of the way. That sounds bad and it is, but the Rockies were 7-33 under Black. The 40-year-old Schaeffer is a Rockies lifer. As a light-hitting infielder, he played in the team’s farm system from 2007-12 before going into coaching. He was serving as third base coach before becoming interim manager.