Eugene Patrick Glynn (born September 22, 1956, at Waseca, Minnesota) is an American professional baseball coach and a former minor league manager and second baseman. He was the 2019 infield and baserunning coordinator of the Miami Marlins of Major League Baseball, and previously served as third base coach of the Minnesota Twins from 2015–18. He also has held coaching positions with four other MLB teams. As an active player, he stood 5 feet 10 inches (1.78 m) tall, weighed 155 pounds (70 kg), and threw and batted right-handed.