John Michael Alt (born May 30, 1962) is a former professional American football offensive tackle in the National Football League. He played his entire NFL career with the Kansas City Chiefs from 1984 to 1996. A graduate of Columbia Heights (MN) High School, he played his college years at the University of Iowa. After retiring from the NFL, Alt began assistant coaching at Cretin-Derham Hall High School in Saint Paul, Minnesota, working with the offensive line. He then went to Totino-Grace High School to coach the offensive line when his son Joe started playing there.