The writing had been on the wall for a while. Horn, the Tigers' lefty reliever, hasn't thrown a pitch in the big leagues since going down with elbow issues back in the spring, and now it's official: he's going under the knife for Tommy John surgery, ending his 2026 season before it ever really got going.
MLB Trade Rumors confirmed the surgery news Saturday.
This one's been a slow burn. Horn landed on the IL with left elbow soreness back in March, had an arthroscopic procedure, got shifted to the 60-day IL in April, and then had a hydrodissection done on the elbow in June to try to calm things down without going the surgical route. None of it worked. When a guy needs a needle-and-fluid procedure just to keep playing catch and it still doesn't hold, Tommy John becomes less of an if and more of a when.
It's a brutal repeat for Horn, who actually had Tommy John surgery once before, back in his sophomore year at McLennan Community College, before he transferred to Auburn and helped pitch the Tigers to the 2019 College World Series. Going through the full rehab grind twice in one career is about as unlucky as it gets for a reliever who was finally starting to carve out a role.
And that's what makes this sting for Detroit specifically. Horn quietly had himself a nice little run in 2025, working to a 1.59 ERA across 10 outings out of the bullpen before the elbow derailed everything. That's exactly the kind of cheap, effective left-handed relief arm every contender wants more of, and now the Tigers are staring at a 2026 season minus that piece and likely without him for a chunk of 2027 too, given the standard recovery timeline for the procedure.
The Tigers' pitching pipeline has taken more than its share of Tommy John hits over the last couple years, and Horn's name now joins that unfortunate list. For a franchise trying to build sustained bullpen depth around a young rotation, losing a reliever who was flashing real results before the injury is the kind of setback that doesn't show up on a scoreboard but absolutely shows up in October.