| Name | Country | PTO Rank | Recent Race | |
|---|---|---|---|---|
OR | Obed Rivas Quiroz | 🇲🇽Mexico | — | 35th — 2024 Americas Triathlon Cup Ixtapa |
OR | Oddett Rodriguez Conde | 🇻🇪Venezuela | — | — |
OA | Odei Aristu Laiglesia | PTO #960 | 26th — 2025 ESP Long Distance Triathlon National Championships | |
OW | Odil Wittemans | 🇧🇪Belgium | — | 26th — 2025 Europe Triathlon Cup Alanya |
 | Oein Josiah | 🇧🇧Barbados | — | 1st — 2025 BAR Sprint Triathlon National Championships |
OL | Ofek Levinsky | 🇮🇱Israel | — | — |
| PTO #73 | 2nd — 2025 Challenge Xiamen | |||
| — | 3rd — 2014 IRONMAN 70.3 Korea | |||
| — | 22nd — 2019 Challenge "The Championship" Samorin | |||
| 🇳🇴Norway | — | — | ||
| 🇳🇴Norway | — | — | ||
| 🇳🇴Norway | — | — | ||
| 🇳🇱Netherlands | — | 44th — 2025 World Triathlon Cup Samarkand | ||
| — | 6th — 2009 Challenge Roth | |||
| 🇳🇱NL | PTO #310 | 15th — 2025 Europe Triathlon Challenge Long Distance Championships Almere-Amsterdam | ||
| — | DNF — 2018 Challenge Denmark Half | |||
| — | 21st — 2006 ITU Long Distance | |||
| 🇳🇴NO | PTO #381 | DNF — 2025 IRONMAN Cozumel | ||
| 🇦🇳Individual Neutral Athlete | — | — | ||
| 🇦🇳Individual Neutral Athlete | — | 10th — 2025 Asia Triathlon Cup Turkestan | ||
| 🇺🇦Ukraine | — | 3rd — 2014 CAN Triathlon National Championships | ||
| 🇺🇦Ukraine | — | — | ||
| 🇺🇦Ukraine | — | DNF — 2025 Europe Triathlon Sprint and Relay Championships Melilla | ||
| 🇨🇦Canada | — | 41st — 2025 Americas Triathlon Cup Kelowna | ||
| — | 10th — 2019 Challenge Walchsee | |||
| — | 15th — 2016 IRONMAN 70.3 Coeur d'Alene | |||
| 🇷🇺Russia | — | 14th — 2016 Challenge Walchsee | ||
| 🇵🇱Poland | — | 8th — 2018 IRONMAN 70.3 Augusta | ||
| — | DNF — 2019 IRONMAN 70.3 Astana | |||
| 🇳🇿NZ | — | 18th — 2025 Oceania Triathlon Championships Devonport | ||
| 🇵🇦Panama | — | 6th — 2025 World Triathlon Development Regional Cup Durazno | ||
| — | 18th — 2008 IRONMAN Canada | |||
| — | 15th — 2017 IRONMAN 70.3 Augusta | |||
| 🇬🇧Great britain | — | 1st — 2025 World Triathlon Championship Finals Wollongong | ||
| 🇿🇦South africa | — | 52nd — 2025 World Triathlon Championship Finals Wollongong | ||
| 🇲🇽Mexico | — | 28th — 2021 Cozumel | ||
| — | 28th — 2021 Cozumel | |||
| — | 41st — 2022 IRONMAN 70.3 Jesolo | |||
| — | DNS — 2022 Triathlon Royan | |||
| 🇩🇰Denmark | — | 23rd — 2026 Africa Triathlon Cup El Galala | ||
| 🇦🇹Austria | — | DNF — 2024 Europe Triathlon Cup Olsztyn | ||
| PTO #713 | 21st — 2025 IRONMAN 70.3 Sweden | |||
| 🇳🇿New zealand | — | 54th — 2025 World Triathlon Cup Vina del Mar | ||
| — | DNF — 2025 Trumer Triathlon | |||
| 🇦🇺Australia | — | 38th — 2025 World Triathlon Championship Finals Wollongong | ||
| 🇩🇪Germany | — | — | ||
| — | 14th — 2008 New Zealand | |||
| PTO #843 | 11th — 2026 Challenge Wanaka Half |
