Leslie Antonio Frazier (born April 3, 1959) is an American football coach and former cornerback who is the assistant head coach and defensive coordinator for the Buffalo Bills of the National Football League (NFL). He previously served as the head coach of the Minnesota Vikings from 2010 to 2013 and previously served as an assistant coach for the Baltimore Ravens, Tampa Bay Buccaneers, Indianapolis Colts, Cincinnati Bengals and Philadelphia Eagles.