Gary Nathaniel Matthews Jr. is an American former professional baseball outfielder. He played Major League Baseball (MLB) from 1999 to 2010. Matthews is the son of the 1973 Rookie of the Year, 1979 All-Star, and former Philadelphia Phillies broadcaster Gary Matthews.

Gary Nathaniel Matthews Sr., nicknamed "Sarge", is an American former professional baseball left fielder, who played 16 seasons in Major League Baseball (MLB). After his playing days, Matthews was a color commentator for Philadelphia Phillies broadcasts. He is the father of former big league outfielder Gary Matthews Jr. The Matthews are one of seven father/son combinations in Cubs history; another son, Delvon, was a member of Milwaukee's Minor League Baseball (MiLB) system in 2000–2001.