The history of these injuries is players recover well. The AOS Medical Center in Glendale, California studied anterior cruciate ligament reconstruction for NBA players between 1994 and 2005. They used the Player Efficiency Statistic to compare performance before and after the injury. Of the 21 players who returned to play of 27 studied (six were older and retired), 15 percent performed better on the statistical measure, 19 percent were within one percentage point and 44 percent decreased somewhat but not substantially.
Dace Bog

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