Stephen James Kahn (born, December 14, 1983 in Fullerton, California) is a professional baseball pitcher who is currently a member of the Seattle Mariners organization. Kahn was drafted in the fifth round of the 2005 Major League Baseball Draft by the Mariners. Kahn attended Servite High School and then Loyola Marymount University prior to being drafted. He was signed by scouts Greg Whitworth, Dennis Gonsalves and Phil Pote.
Kahn was a member of the 2004 United States national baseball team. He was ranked as the ninth best prospect in the Mariners' organization by the Seattle Post-Intelligencer in 2006. Kahn's pitching repertoire includes a 93 to 96-mph four-seam fastball and a curveball.