Derek Anderson played basketball at the University of Kentucky (and in the NBA). His senior year he tore his ACL in either the first or second week of January in a game against Auburn. The year was 1997. He was cleared to play in the NCAA Tournament in March. He was dunking in shoot arounds, etc. Rick Pitino’s decided to hold him out for fear of reinjury before the NBA draft, but he was medically cleared to play. Of course this was an extreme outlier of cases regarding ACL tears and Anderson was obviously a very quick healer. But considering the year was 1997, it just shows how fast great athletes CAN come back from ACL injuries.