A native greater Clevelander, Glenn Mills began participating in competitive swimming even before he went to school. In high school he set a National Record in the 100 yard breastroke. In 1980 he won the Senior National Championship, establishing a new national record, and won the U.S.A. Olympic Trials that year to qualify for the USA Team. In 1983, representing the University of Alabama, he won the NCAA 200 yard breastroke title.