Sideline assessment and return-to-play decision-making for an acute elbow ulnar collateral ligament sprain.

UNLABELLED: Throwing athletes are at high risk for elbow injuries. The ulnar collateral ligament (UCL) of the elbow, in particular, must resist large valgus forces during the throwing motion. An acute UCL sprain requires the sports medicine professional on the sidelines to thoroughly assess the injury and reach a return-to-play decision in a timely manner. A sports medicine professional who makes an accurate diagnosis, reaches a correct return-to-play decision, and initiates early treatment gives the athlete the best chance for a rapid, successful return to their sport. LEVEL OF EVIDENCE: 5.