B
- Mike Bacsik
- Carlos Baerga
- Stan Bahnsen
- Bob Bailey
- Collin Balester
- Bret Barberie
- Josh Bard
- Greg Bargar
- Brian Barnes
- Skeeter Barnes
- Tim Barrett
- Michael Barrett
- Tony Barron
- Randy Bass
- John Bateman
- Miguel Batista
- Tony Batista
- Joe Beimel
- Juan Bell
- Ronnie Belliard
- Rigo Beltrán
- Francis Beltrán
- Freddie Benavides
- Yamil Benítez
- Gary Bennett
- Shayne Bennett
- Chad Bentz
- Peter Bergeron
- Jason Bergmann
- Roger Bernadina
- Tony Bernazard
- Sean Berry
- Rocky Biddle
- Larry Biittner
- Dann Bilardello
- Joe Bisenius
- Brian Bixler
- Tim Blackwell
- Dennis Blair
- Tony Blanco
- Matt Blank
- Geoff Blum
- John Boccabella
- Frank Bolick
- Emilio Bonifacio
- Chris Booker
- Aaron Boone
- Don Bosch
- Shawn Boskie
- Kent Bottenfield
- Denis Boucher
- Micah Bowie
- Oil Can Boyd
- Milton Bradley
- Ron Brand
- Bill Bray
- Hal Breeden
- Fred Breining
- Dan Briggs
- Jim Britton
- Brian Broderick
- Hubie Brooks
- Jim Brower
- Jackie Brown
- Corey Brown
- Curt Brown
- Curtis Brown
- Brian Bruney
- Jim Bullinger
- Kirk Bullinger
- Eric Bullock
- Jamie Burke
- Tim Burke
- Sean Burnett
- Ray Burris
- Sal Butera
- Marlon Byrd
Read more about this topic: Washington Nationals All-time Roster