Ronnie G. Brown, Jr. (born December 12, 1981) is an American football running back for the San Diego Chargers of the National Football League (NFL). After graduating from Cartersville High School in Georgia, Brown attended Auburn University to play college football for the Auburn Tigers. He and Cadillac Williams shared carries at running back, while he had 1,008 yards and 13 touchdowns in 2002, 446 yards and five touchdowns in 2003, and 913 yards and eight touchdowns in 2004. Brown finished seventh in school history with 2,707 rushing yards and fifth with 28 rushing touchdowns. He twice earned second-team Associated Press All-Southeastern Conference honors, in 2002 and 2004.