This study compared lower leg biomechanical differences specifically at the knee while performing jump stop and cutting tasks. This was done because of the need to better understand the specific mechanisms that contribute to non contact ACL tears. Much of the focus has been on non contact ACL tears while performing a stop-jump task. This study examined at the mechanisms of a cutting task as it relates to the incidence of non contact ACL tears. We found that the mechanisms of the cutting task are biomechanically different than the stop-jump task, suggesting the need to focus on the cutting task as a separate entity when looking at preventing non contact ACL tears. Overall, this new knowledge should help further research attempting to help reduce the incidence of non contact ACL ruptures.