Grantham spoke Monday during a conference call with Georgia-based media. The No. 20 Cardinals (9-3) are set to meet the 13th-ranked Bulldogs (9-3) in the Dec. 30 game at Charlotte.
Grantham spent four years as Georgia's defensive coordinator. He left for Louisville after the 2013 season, joining the staff of new coach Bobby Petrino.
During his time with the Bulldogs, Grantham says he helped to "change the culture" by instilling more mental and physical toughness. He says the Georgia defense is viewed much differently now than it was when was hired in 2010.
He says, "I think we did a tremendous job."
