John Graves Hester
- Bats Right, Throws Right
- Height 6' 3", Weight 220 lb.
- School Stanford University
- High School Marist School
- Debut August 28, 2009
- Final Game September 16, 2013
- Born September 14, 1983 in Atlanta, GA, USA
Hester hit a two-run pinch hit home run off the Astros' Wilton Lopez in his major league debut for the Diamondbacks on August 28, 2009. The D-Backs won the game, 14-7. Ironically, Lopez was also making his major league debut that day.