Tressel's tenure would, however, come to an abrupt end with his resignation in May 2011 amidst an NCAA investigation into improper benefits violations involving OSU football players during the 2010 season. The investigation resulted in OSU self-vacating victories from the 2010 season including the 2011 Sugar Bowl. Tressel finished his career at Ohio State with an official overall record of 94–22 (), including six Big Ten Conference championships, a 5–4 bowl record, a 4–3 mark in BCS bowl games, and an 8–1 record against the arch-rival Michigan Wolverines. Tressel's eight wins against the University of Michigan place him second in school history to Woody Hayes, who had 16, and he is tied with Urban Meyer as the only Ohio State head coaches to win seven consecutive games against the Wolverines. Tressel's success as a head coach led to him being inducted into the College Football Hall of Fame in 2015.