"I called them last night and said I'd take the job," English told The Associated Press Tuesday following Michigan's 41-35 win over Florida in the Capital One Bowl. "I've appreciated my time at the University of Michigan, particularly the opportunity to work with coach Lloyd Carr, a man I love."
English, who interviewed for the head coaching positions at Michigan and Arkansas, agreed to a two-year deal with the Cardinals.
"I'm excited about the opportunity at Louisville, where I'm going to get another chance to prove that I can affect change," English said. "We need to change the personality of the defense and I can't wait to get started."
English replaces Mike Cassity, who was fired after four season's as Louisville's defensive coordinator. English, 39, has his work cut out for him as he inherits a defense that ranked 84th nationally in total defense and 93rd in scoring defense in 2007.
English spent five seasons in Ann Arbor and also served stints as an assistant at Arizona State and San Diego State. English played collegiate football at California.
English was criticized earlier this season for his defense's performance against the spread-offenses of Appalachian State and Oregon. Tuesday, though, in his final game at Michigan, English proved he had the right answers to counter Florida's spread-offensive attack.
Michigan, under English's guidance, limited Heisman Trophy winning quarterback Tim Tebow to just 154 yards passing on 17 of 33 pass attempts. English's defense held Florida to only 2 of 11 on third down conversions.