BM | Bryce McMaster | | — | 10th — 2018 IRONMAN Western Australia |
BW | Bryce Williams | | — | 51st — 2024 IRONMAN 70.3 Boulder |
BF | Bryn Freeman | | — | 19th — 2011 IRONMAN South Africa |
BS | Buck Swannick | | — | 9th — 1979 IRONMAN Hawaii |
BG | Buddy Green | | — | DNF — 2010 ITU Long Distance |
BG | Bukhbat Gantumur | 🇲🇳Mongolia | — | — |
BÇ | Burak Çağdaş | 🇹🇷Turkey | — | 47th — 2025 Europe Triathlon Cup Alanya |
BO | Burcak Ozer | 🇹🇷Turkey | — | — |
| | | — | 14th — 2007 IRONMAN Austria |
| | 🇧🇲Bermuda | — | DNS — 2009 IRONMAN Australia |
| | 🇷🇼Rwanda | — | 4th — 2024 World Triathlon Development Regional Cup Kilifi |
| | 🇰🇷South Korea | — | DNF — 2004 IRONMAN Florida |
| | 🇰🇷South Korea | — | 5th — 2013 IRONMAN Japan |