May 14, 2021

Struggling A’s Lose Trevor Rosenthal to Thoracic Outlet Syndrome (FanGraphs)

After pitching his way back from the outskirts of oblivion last year, Trevor Rosenthal fared relatively well via free agency, landing a one-year, $11 million deal from the A’s. Unfortunately, he has yet to take the mound for the team, and now it appears that it could be awhile before he does, even in a best-case scenario. On Thursday, Rosenthal underwent surgery to alleviate thoracic outlet syndrome, a loss that hardly helps an A’s pitching staff that’s off to a rough start this season.

The 30-year-old Rosenthal spent 2020 with the Royals and Padres, notching 11 saves while tossing 23.2 innings with a 1.90 ERA and 2.22 FIP; both his 41.8% strikeout rate and 33.0% strikeout-walk differential ranked sixth in the majors among relievers with at least 20 innings. He made an impressive rebound from a rough 2 1/2-year stretch that began with late-2017 Tommy John surgery that cost him the last quarter of that season and all of ’18; when he returned, he struggled greatly with his control, walking 26 batters in 15.1 innings while being rocked for a 13.50 ERA, and getting released in mid-season by both the Nationals and Tigers.

Rosenthal agreed to a deal with the A’s on…

Read “Struggling A’s Lose Trevor Rosenthal to Thoracic Outlet Syndrome” at FanGraphs