After a 20-month leave from higher education, Calhoun returned to college, this time at American International College in Springfield, Massachusetts, where he was given another basketball scholarship. He was the leading scorer on the team his junior and senior seasons, and captained the team in his final year, during which AIC advanced to the Division II playoffs. At the time he graduated, he was ranked as the fourth all-time scorer at AIC. Calhoun graduated in 1968 with a bachelor's degree in sociology.