The quarterback for the St. Louis Rams, Sam Bradford, tore his Anterior Cruciate Ligament (ACL) this past weekend, ending his current season. Unfortunately, ACL tears are a common injury in sports like football that have significant pivoting and change of direction as part of the game. They can occur as part of a traumatic injury (where the knee is put in an unnatural position and the ligament tears due to excessive force applied to the knee) or as part of a non-contact pivoting injury, which is actually the most common mechanism of injury.
