You can be the owner of this OU football autographed by one of football's greatest running backs - Adrian Peterson! This football was autographed by Peterson in 2007 when he was named Rookie of the Year. The Eng's obtained this autographed ball at a private signing and guarantees it to be 100% authentic. Peterson is on of the toughest signatures to obtain, particularly on an OU football, so bid strong to own this prized possession!.