This surgery is named after a pitcher Tommy John, the first professional athlete to successfully undergo the operation in 1974.
Tommy John Surgery has high chance of complete recovery, estimated at 87-94 percent. In two months, players who undergo the operation can start doing weight exercise, but still needed a year for full recovery. Tommy John Surgery also pose some risk of damage to the ulvar nerve.
Most of the baseball pitchers who undergo Tommy John Surgery throw harder after they recover and come back to the game. Many parents thinks that this is a result of the surgery, and bring their uninjured son to perform the procedure, hoping that it can increased their performance.
This is a misconception.
The pitchers throw harder because they put more attention to physical conditioning after the surgery. The new tendon also can took several years to deteriorate, causing the pitchers velocity to gradually increased over these years.