Chad Austin Tracy (born May 22, 1980, in Charlotte, North Carolina) is a third baseman in Major League Baseball who plays with the Arizona Diamondbacks. Tracy, also commonly known as "Opposite Field Tracy" or "Dr. Tracy," bats left-handed and throws right-handed.

Tracy compiled a .339 batting average during his career at East Carolina University, strictly hitting the ball to the opposite field; hence the nickname. He was selected by the Arizona Diamondbacks in the seventh round of the 2001 Major League Baseball Draft.

He played third base in El Paso, Texas, for the El Paso Diablos. In four minor league seasons, Tracy hit .335 with 24 home runs, 85 doubles, and 206 RBIs in 337 games. In 2002, he was selected to participate in the Futures Game during the All-Star break as the starting third baseman on the U.S. squad.