We have reported an unusual case of pectoralis major muscle rupture and repair. There were three interesting aspects of this case. First, the injury occurred in a football player with an unusual mechanism of injury. Second, MRI using special techniques was valuable in confirming the diagnosis acutely and in planning treatment. Finally, we reported on the use of suture anchors to secure the avulsed tendon. We recommend the early use of MRI for diagnosis and in planning treatment of suspected pectoralis major muscle ruptures.