Dr. MacArthur is a board-certified and fellowship-trained primary care sports medicine physician. With more than 10 years of experience, he has a special interest in the prevention and management of all musculoskeletal and athletic injuries, as well as the use of diagnostic ultrasound, therapeutic platelet-rich plasma, prolotherapy and ultrasound-guided procedures. Dr. MacArthur currently serves as a consulting team physician for the Washington Nationals and as head team physician for the semi-pro ultimate frisbee team, the DC Breeze. Previously, Dr.