The 33-year-old hurler had been attempting a comeback at Triple-A Toledo, but was shut down due to arm pain and ultimately underwent elbow surgery in mid-June. He’ll miss the remainder of the 2023 season at a minimum.

The team is calling it a UCL reconstruction revision, which will cost him at least the rest of this year. If it's a full Tommy John, he'll miss much of next year, too. It's been very tough sledding for Rosenthal of late, as he needed thoracic outlet surgery in 2021. He hasn't pitched in the majors since 2020, and he had thrown just three innings in the minors for the Tigers this season.

Working at 92-96 mph, Rosenthal, who had thoracic outlet surgery in 2021, gave up hits to four of the six batters he faced today. His 93.9 mph average on his fastball was down about four mph from when he was last seen in 2020. He'll probably get some of that back with time, but he's going to have to do so in the minors initially.

Tigers manager A.J. Hinch said Tuesday that Rosenthal is healthy, but won't make the Opening Day roster. He also added that his fastball velocity and secondary pitches have looked good this spring. Detroit is understandably taking a cautious approach with the injury-plagued 32-year-old's ramp-up process as he's been limited to just 32 relief appearances over the last three years. He's expected to be ready to go at some point in April.