Wearable technology has finally hit the big leagues. Three engineering students from Northeastern University have developed a “data-logging” compression shirt that helps baseball pitchers avoid torn ligaments. The high-tech sheath, which is fitted with motion sensors and a web of conductive threads, tracks its wearer’s pitching mechanics during a game in real time, then relays that data to a monitor in the dugout. By analyzing the information, coaches can spot inconsistencies that could result in injury, whether as a result of fatigue or poor technique.