Pitchers are more commonly injuring their ulnar collateral ligament. Ulnar collateral ligament surgery or Tommy John surgery is becoming almost commonplace in both Major League ballplayers and high school and college players alike. For many the surgery is successful and after 10-12 months many pitchers will return to the pitchering mound.
For the first time this past season the conversation came up about whether or not a MLB pitcher should limit his pitch count after surgery to minimize the risk of developing a recurrent tear in his ulnar collateral ligament. For anyone who has undergone a major ligament reconstruction and the extensive rehabilitation which follows you will understand why minimizing the risk of a second injury is so critical.
A number of surgeons and researchers at Rush in Chicago recently published their findings to help guide pitchers. In their publication the researchers did not find that the post surgery pitch count or number of innings pitched contributed to a recurrent injury.
Now… please do not misinterpret this research. Sadly, many players will go on to suffer a new tear and require yet a second Tommy John procedure. Pitch counts do matter. There is a risk of re-injury. This paper simply states that the number of innings pitched or the number of pitches thrown did not appear to correlate with an increased risk of re-injury.