The Boston Red Sox made a flurry of roster moves just before Monday's series opener against the Detroit Tigers at Fenway Park, with all three changes affecting the team's left-handed pitching depth.

First, the Red Sox placed veteran reliever Danny Coulombe on the 15-day injured list, retroactive to May 2, due to cervical spasms. Coulombe last appeared in Friday's 3-1 win over the Houston Astros, retiring two of three batters faced while allowing one hit. The 36-year-old has struggled in his debut season with Boston, posting a 0-1 record with a 5.63 ERA and a 1.50 WHIP over eight innings.

To fill Coulombe's spot on the active roster, the Red Sox called up left-hander Alec Gamboa from Triple-A Worcester. The 29-year-old has yet to make his Major League debut and has been inconsistent as a starter in the minors, carrying a 6.23 ERA across three starts. However, his 15 strikeouts in 13 innings suggest there's untapped potential waiting to break through at the big-league level.

In a third move, Boston transferred left-hander Patrick Sandoval from the 15-day to the 60-day injured list. Sandoval hasn't pitched since the 2024 season as he continues to recover from internal brace surgery on his left elbow. His rehab hit a snag in late April when he suffered a setback during a minor league assignment, and he has yet to resume throwing, leaving his return timeline uncertain.

These roster adjustments come as the Red Sox look to stabilize their pitching staff early in the season, with Gamboa's promotion offering a fresh arm and a potential spark from the bullpen.