Two years.That's the book on players who suffer ACL injuries. It supposedly takes two years before an athlete to get the explosiveness lost to return to the injured knee. Just look at Edgerrin James: he averaged 4.2 and 4.4 yards in his first two seasons, then lost the final two months of his 2001 season to an ACL injury. The next season, James posted a completely out of character 3.6 YPC. But once he was two years removed from the injury, James' final three years in Indy went to ...