Garrett Charles Stephenson (born January 2, 1972), is a retired Major League Baseball pitcher. He played eight seasons in the majors, from 1996-2003. He is known for his role in the book "3 Nights In August", as the pitcher, and loser for the Cardinals in game one.

Stephenson suffered a sprained medial collateral ligament in Game 3 of the 2000 National League Division Series against the Atlanta Braves. The injury led to him having Tommy John surgery and missing the entire 2001 season.