Ethan Hammerberg Pitching (IMAGE) MediaSource Caption Fifty percent of high school pitchers report experiencing pain in their throwing arm during the season. Researchers at The Ohio State University Wexner Medical Center worked with players like Ethan Hammerberg to better understand the cause of these overuse injuries. Credit The Ohio State University Wexner Medical Center Usage Restrictions All multimedia is available for free and unrestricted media use with a courtesy to The Ohio State University Wexner Medical Center License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.