Glenn performed as two-way lineman at Bishop O'Dowd High School in Oakland, California, and later attended the University of California, Berkeley, where he was a four-year letterman and two-year starter.
Glenn performed as two-way lineman at Bishop O'Dowd High School in Oakland, California. Glenn later attended the University of California, Berkeley. He was a four-year letterman-year starter. He was a four-two-year starter.