| Name | Country | PTO Rank | Recent Race | |
|---|---|---|---|---|
OU | Ormaechea Unzueta | — | 14th — 2023 Embrun | |
Om | Oronoz mateo Enara | — | 17th — 2022 Alpe D'Huez L | |
_-_JR2017.jpg){kind=small} | Oscar Coggins | 🇭🇰Hong kong | — | 7th — 2026 Asia Triathlon Cup and Southeast Asia Championships Putrajaya |
OD | Oscar Daniel Quiroz Abrego | 🇲🇽MX | — | 27th — 2024 Americas Triathlon Cup La Paz |
 | Oscar Dart | 🇦🇺Australia | — | 22nd — 2025 Oceania Triathlon Championships Devonport |
OG | Oscar Galindez | — | 12th — 2018 IRONMAN 70.3 Augusta | |
OG | Oscar Garrido Ruiz | — | 40th — 2024 Zarauzko Triathlon | |
| 🇩🇰Denmark | — | 2nd — 2025 ESP Sprint Triathlon National Championships | ||
| PTO #957 | 33rd — 2025 ESP Middle Distance Triathlon National Championships | |||
| — | DNS — 2022 Triathlon Royan | |||
| 🇸🇪Sweden | — | 15th — 2026 Africa Triathlon Cup El Galala | ||
| — | 38th — 2023 Alpe D'Huez L | |||
| 🇬🇧Great britain | — | 15th — 2025 Europe Triathlon Cup Tenerife - Santa Cruz | ||
| — | DNS — 2023 TradeInn Full International Triathlon | |||
| 🇦🇺Australia | — | 3rd — 2025 World Triathlon Championship Finals Wollongong | ||
| 🇸🇪Sweden | — | 15th — 2025 Europe Triathlon Baltic Championships Otepää | ||
| — | 9th — 2019 IRONMAN 70.3 Astana | |||
| 🇸🇪Sweden | — | 3rd — 2016 SWE Middle Distance Triathlon National Championships | ||
| 🇪🇪Estonia | — | 26th — 2025 World Triathlon Development Regional Cup Izvorani | ||
| 🇱🇹Lithuania | — | DNF — 2025 Europe Triathlon Sprint and Relay Championships Melilla | ||
| 🇱🇻Latvia | — | 5th — 2025 LAT Triathlon National Championships | ||
| 🇲🇽Mexico | — | DNF — 2025 World Triathlon Cup San Pedro de la Paz | ||
| — | 18th — 2016 IRONMAN 70.3 Xiamen | |||
| 🇨🇿Czech republic | — | — | ||
| 🇯🇵Japan | — | — | ||
| 🇩🇿Algeria | — | 32nd — 2025 Africa Triathlon Cup Tipaza | ||
| 🇩🇿Algeria | — | 5th — 2025 Africa Triathlon Sprint Championships El Galala | ||
| 🇹🇳Tunisia | — | — | ||
| — | 21st — 2018 IRONMAN Lanzarote | |||
| — | 32nd — 2023 IRONMAN 70.3 Indian Wells La Quinta | |||
| 🇲🇳Mongolia | — | — | ||
| — | 19th — 2009 IRONMAN New Zealand |
_-_JR2017.JPG){kind=small}
