The Tigers announced Wednesday that Horn is recovering from arthroscopic left elbow surgery, Chris McCosky of The Detroit News reports.

EDGE Analysis

It's unclear when exactly Horn had the operation, so a timetable for him to resume throwing is also cloudy. The lefty made 10 appearances out of the Tigers bullpen last season, collecting a 1.59 ERA and 10:7 K:BB over 11.1 innings.