Wilson's 2013 team improved to 5–7, and while the Hoosiers featured one of the Big Ten's more potent offenses (ranked 2nd in the Big Ten for 2013), the team's defense was among the conference's worst (12th in the Big Ten). The Hoosiers set school and Big Ten records for most yards and points allowed per game, and the Hoosiers lost three games in which they scored at least 35 points. Wilson fired defensive coordinator Doug Mallory following the 2013 season and replaced him with Brian Knorr, the former defensive coordinator of Wake Forest and former head coach at Ohio.