Oakland has already added a new head coach in Jack Del Rio and an offensive coordinator in veteran NFL assistant coach Bill Musgrave.
The 48-year-old Grantham finished his first season with the Cardinals in 2014. Louisville ranked sixth in the nation in total defense, allowing 308.5 yards per game and 4.75 yards per play. The team allowed 21.8 points per game, tied with Duke for 24th in the country.
The Cardinals were 9-4 in 2014, finishing 5-3 in their inaugural season in the Atlantic Coast Conference. The team ended the season with a 37-14 loss to Georgia in the Belk Bowl on Dec. 30.
Prior to joining Bobby Petrino’s staff at Louisville, Grantham was defensive coordinator at Georgia for four seasons, during which the Bulldogs compiled a 36-18-1 record and earned four consecutive bowl game appearances.
Grantham has 11 years of NFL coaching experience, including three seasons as defensive coordinator for the Cleveland Browns from 2005 to 2007. He was defensive line coach for the Indianapolis Colts from 1999 to 2001, the Houston Texans from 2002 to 2004 and the Dallas Cowboys from 2008 to 2009.
He began his coaching career at Virginia Tech in 1990, spending six seasons with the Hokies as a defensive coach. He was defensive line coach at Michigan State from 1996-98 before heading to the NFL.