James Powell Mattox
- Bats Left, Throws Right
- Height 5' 9½", Weight 168 lb.
- School Washington and Lee University
- Debut April 30, 1922
- Final Game September 30, 1923
- Born December 17, 1896 in Leesville, VA USA
- Died October 12, 1973 in Myrtle Beach, SC USA
Jim Mattox was one of five baseball-playing brothers, including Cloy Mattox.