Joseph Buren Cassel
- Bats Right, Throws Right
- Height 6' 2", Weight 190 lb.
- School Loyola Marymount University
- Debut August 10, 2007
- Final Game September 27, 2008
- Born August 8, 1980 in Los Angeles, CA USA
Jack Cassel is the brother of NFL quarterback Matt Cassel. Another brother, Justin Cassel, is a minor league pitcher. Along with Chris Dickerson, Cassel cofounded the non-profit environmental group Players for the Planet.