Medial collateral ligament (MCL) injuries are common injuries in sports. Most MCL injuries occur with direct contact or from cutting maneuvers with the foot planted. These knee ligament injuries often occur in sports such as skiing, wrestling, hockey, soccer, football and rugby. Male athletes appear to have a greater risk than female athletes. In a study of United States Military Academy cadets, the average amount of time lost per MCL injury was 23.2 days. Higher grade sprains led to more time lost than grade 1 sprains.
Source: American Journal of Sports Medicine, Published online before print March 6, 2014