J
- Damian Jackson
- Edwin Jackson
- Grant Jackson
- Bob James
- Pat Jarvis
- Larry Jaster
- Garry Jestadt
- D'Angelo Jiménez
- Ken Johnson
- Larry Johnson
- Mike Johnson
- Nick Johnson
- Randy Johnson
- Ron Johnson
- Roy Johnson
- Tony Johnson
- Wallace Johnson
- Barry Jones
- Jimmy Jones
- Mack Jones *
- Terry Jones
- Tracy Jones
- Mike Jorgensen
- Jeff Juden
Read more about this topic: Washington Nationals All-time Roster