ulnar collateral ligament

Angels' Andrelton Simmons needs surgery to repair UCL in left thumb
Angels shortstop Andrelton Simmons will require surgery after suffering a torn ligament in his left thumb, the team announced Monday.
Starter Brandon McCarthy out rest of 2015 with torn UCL in right elbow
Matt Moore to get Tommy John
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Starter Brandon McCarthy out rest of 2015 with torn UCL in right elbow
Matt Moore to get Tommy John