Mixed martial arts (MMA) have enjoyed a tremendous growth in popularity over the past 10 years, yet there remains a paucity of information with respect to common injuries sustained in MMA competitions. In the available studies, certain trends pertaining to risk factors for injury, as well as the most common injuries sustained in MMA competition, were noted. Common risk factors include being the losing fighter, history of knockout or technical knockout, and longer fight duration. Common injuries that were noted include lacerations and abrasions, followed by injuries to the face and ocular region. Concussions with or without loss of consciousness also were noted in MMA competition.