In his senior year, Hannon scored 44 points in a game against New Mexico, which set a school record. He also pulled down 27 rebounds against Pittsburgh on February 22, 1954; this is still a school record.
Overall, Hannon led Army in scoring and rebounding each of his three years. He finished his college career with 1,155 points and 1,101 rebounds, and both totals were school records at that time. His 19.0 career rebounding average in 58 games is still the highest in Army history.