- Gabriel Badilla - NE
- Mehdi Ballouchy - COL
- Mike Banner - CHI
- Brandon Barklage - DC
- Darrius Barnes - NE
- Chad Barrett - TFC
- Wade Barrett - HOU
- Julien Baudet - COL
- Kyle Beckerman - RSL
- David Beckham - LA
- Tony Beltran - RSL
- Jair Benitez - FCD
- Gregg Berhalter - LA
- Matt Besler - KC
- Christopher Birchall - LA
- Cuauhtemoc Blanco - CHI
- Nat Borchers - RSL
- Danleigh Borman - NY
- Jonathan Bornstein - CHV
- Terry Boss - NY
- Bobby Boswell - HOU
- Tristan Bowen - LA
- Andrew Boyens - NY
- Justin Braun - CHV
- Jim Brennan - TFC
- CJ Brown - CHI
- Evan Brown - SEA
- Eric Brunner - CLB
- Edson Buddle - LA
- Marc Burch - DC
- Bobby Burling - SJ
- Kevin Burns - CLB
- Preston Burpo - COL
- Ray Burse - FCD
- Jon Busch - CHI
- Peter Byers - SJ