John Walker (born April 25, 1983) is a former arena football defensive back.
Walker attended Birmingham High School in Van Nuys, California and was a letterman in football and track.
Walker played college football for the University of Southern California.
Walker was signed as a free agent for the National Football League's Houston Texans practice squad in 2006.
On February 4, 2008, Walker signed with the Arena Football League's New York Dragons.