Ulnar collateral ligament
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Sims: Mets' Harvey Learning That The Body Has Its Own Recovery PlanUnless he’d like to face a revision surgery down the road -- perhaps sooner than later -- Matt Harvey would be wise to take direction from his medical team without a fight.

Injury Breakdown: Tommy John Surgery, The Worst-Case Scenario For Joba ChamberlainOnly one day after going on the DL with what was purported to be a muscle strain of the flexor tendons attaching at the inner elbow (medial epicondylitis), a contrast MRI revealed that Joba Chamberlain has a ligament tear that will likely require Tommy John surgery.