A highly recruited forward out of Memphis, Millen earned a career high of 14 points against Hawaii-Loa and six points against delaware State, both in his sophomore year. He averaged just under 10 minutes a game for his career, with a memorable moment being a lost opportunity: Millen had the final shot as the Hoyas trailed Minnesota by one point in the 1993 NIT final, but his game winning attempt fell short.

In 2010, Millen ran for Congress in the 9th District of Tennessee, receiving six percent of the vote in the Republican primary.