Anterior Cruciate Ligament (ACL) Injuries of the knee
The ACL (Anterior Cruciate Ligament) is perhaps the most-feared injury amongst all athletes. Without a functioning ACL, an athlete is
generally unable to change direction without the knee joint collapsing. Modern-day athletes are fortunate that the ACL can be reconstructed with advanced surgery, but even in the best of hands an ACL reconstruction will keep a player out for 5-12 months from sport. In addition, there is a lifetime increased risk of further problems both to the affected knee and also the opposite knee.
Some football players have suffered multiple ACL injuries, including recently retired players David Schwarz of the Melbourne Demons (who has had 3 reconstructions on the same knee) and Nik Kosef of the Manly Eagles (who has had 2 reconstructions on each knee).