Grantham interviewed to join Jack Del Rio's Raiders staff but will instead return for a second season under Bobby Petrino at Louisville.
"I'm grateful for the opportunity to have interviewed for the defensive coordinator position with the Oakland Raiders, but I'm committed to the University of Louisville," Grantham said in a statement, according to The Courier-Journal. "I said when I came to Louisville that I thought we could win a national championship, and we are building toward that goal with the success we had this season."
Louisville ranked sixth in the nation in total defense this season, holding opponents to 308.5 yards per game, and ranked 24th nationally in scoring defense.
Before coming to Louisville, Grantham was the defensive coordinator at Georgia from 2010 to 2013. He coached in the NFL from 1999 to 2009, including a three-year stint as the defensive coordinator for the Cleveland Browns.
- Dan Gartland