A damaged ACL doesn't have to be fixed—players are now competing successfully in the NBA with damaged ACLs. Anthony Daly, the Clippers' team physician, says, "You can lead a normal life without an ACL, but you can't play a cutting sport like basketball."
San Antonio Spur forward Sean Elliott tore part of his ACL when he was only 14. Surgical reconstruction wasn't done at the time because it would have interfered with the growth of the bones in his knee. He still has more play in his knee than normal, but why correct that and take away a year of his promising career when he performs as well as he does?