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Pitchers provided only half of their value to teams at 3 years postoperatively, despite presumably being physically recovered. Even though most pitchers regained their previous form in various pitching metrics, the majority of pitchers did not return to full form. Overall, being a starting pitcher was the strongest negative predictor of returning to full performance, followed by faster preoperative velocity and older age. The return-to-performance rate for each pitching metric improved season to season after returning from an injury. Despite returning to play at high rates, pitchers still needed time to recover their performance.
Mastroianni et al. (Wed,) studied this question.