Greisen was the starting quarterback for the Bearcats during the 1997 and 1998 seasons. He compiled a record of 27-1, including a 15-0 mark in leading Northwest to its first NCAA national championship in 1998. Greisen was a consensus first-team All-American in 1998 and graduated holding nine program passing records.
Greisen was drafted by the Arizona Cardinals upon graduation and is currently the starting quarterback for the AFL's Georgia Force. He was a candidate for the league's Most Offensive Player award this past season when he set the league's single-season touchdown mark at 117.