Glenn S. Fleisig PhD

Dr. Glenn S. Fleisig, Ph.D., is the Research Director of the American Sports Medicine Institute (ASMI). Much of ASMI’s research under Dr. Fleisig has focused on throwing injury prevention and treatment. Dr. Fleisig is a recognized leader in baseball pitching biomechanics, identifying mechanics for minimizing elbow and shoulder loads while maximizing ball velocity. He has also published biomechanical studies on the softball pitch, football pass, volleyball spike, volleyball serve, baseball swing, and golf swing. Dr. Fleisig and his team have analyzed thousands of baseball pitchers, from youth leagues to Major Leagues, providing individualized recommendations for safety and performance.

Dr. Fleisig also has numerous publications in sports medicine epidemiology and clinical outcomes. Much of the epidemiologic work has focused on elbow and shoulder injuries in baseball pitchers. His clinical studies have shown the efficacy of surgical treatments, such as return to play after ACL reconstruction or UCL reconstruction.

In addition to his work at ASMI, Dr. Fleisig serves as chair of the USA Baseball Medical & Safety Advisory Committee, injury research advisor for Major League Baseball, safety consultant for Little League Baseball, and adjunct faculty at UAB. He is a member of Major League Baseball’s elbow task force, National Pitching Association’s board of advisors, and MomsTEAM’s board of advisors. Dr. Fleisig is working with Motus Global in the development of consumer technologies for measuring and monitoring an athlete’s biomechanics.