OV | Ole Vinnergaard | 🇩🇰Denmark | — | 18th — 2009 Egirdir ITU Triathlon European Cup |
OG | Oleg Gudinov | 🇷🇺Russia | — | 15th — 2019 RUS Middle Distance Triathlon National Championships |
OK | Oleg Kuzikhin | 🇦🇳Individual Neutral Athlete | — | 10th — 2025 Asia Triathlon Cup Turkestan |
OZ | Olegs Zivs | 🇱🇻Latvia | — | 12th — 2017 BLR Triathlon National Championships |
OF | Oleh Fedorenko | 🇺🇦Ukraine | — | 27th — 2015 Challenge Rimini |
OO | Oleksandr Obushenko | 🇺🇦Ukraine | — | 34th — 2012 Alanya ITU Triathlon Premium European Cup |
| | 🇺🇦Ukraine | — | 42nd — 2003 Alanya ETU Triathlon European Cup |
| | 🇺🇦Ukraine | — | 7th — 2016 UKR Triathlon National Championships |
| | 🇺🇦Ukraine | — | — |
| | 🇦🇿Azerbaijan | — | DNF — 2018 Alanya ETU Triathlon Junior European Cup |
| | 🇺🇦Ukraine | — | 6th — 2016 UKR Triathlon National Championships |
| | 🇺🇦Ukraine | — | 41st — 2019 Weert ETU Triathlon European Championships |
| | 🇺🇦Ukraine | — | 5th — 2025 UKR Sprint Triathlon National Championships |
| | 🇨🇦Canada | — | 41st — 2025 Americas Triathlon Cup Kelowna |
| | 🇺🇦Ukraine | — | 25th — 2022 BEL Triathlon National Championships |
| | | — | 10th — 2019 Challenge Walchsee |
| | 🇺🇦Ukraine | — | 21st — 2007 Alanya ITU Triathlon Premium European Cup |
| | 🇺🇦Ukraine | — | 5th — 2017 Astana ASTC Sprint Triathlon Asian Cup and Central Asian Championships |
| | 🇺🇦Ukraine | — | — |
| | 🇺🇦Ukraine | — | 5th — 2013 UKR Triathlon National Championships |
| | 🇺🇦Ukraine | — | 17th — 2009 Kedzierzyn Kozle ITU Triathlon Premium European Cup |
| | 🇺🇦Ukraine | — | 15th — 2016 IRONMAN 70.3 Coeur d'Alene |
| | 🇷🇺Russia | — | 9th — 2015 RUS Triathlon National Championships |
| | 🇷🇺Russia | — | 22nd — 2019 Alanya ETU Triathlon Junior European Cup |
| | 🇷🇺Russia | — | 22nd — 2018 RUS Triathlon National Championships |
| | 🇵🇱Poland | — | 4th — 2024 ITA Middle Distance Triathlon National Championships |
| | 🇪🇪Estonia | — | — |
| | 🇵🇱Poland | — | DNS — 2018 Olsztyn ETU Sprint Triathlon European Cup |
| | 🇷🇺Russia | — | DNF — 2021 EST Triathlon National Championships |
| | 🇷🇺Russia | — | 20th — 2014 Paguera-Mallorca ETU Challenge Half Distance Triathlon European Championships |
| | 🇰🇿Kazakhstan | — | 4th — 2012 Kokshetau ITU Triathlon Asian Cup |
| | 🇨🇾Cyprus | — | 8th — 2024 FRA Sprint Triathlon National Championships |
| | 🇷🇺Russia | — | 27th — 2003 Alanya ETU Triathlon European Cup |
| | 🇬🇷Greece | — | 5th — 2014 GRE Sprint Triathlon National Championships |
| | 🇰🇿Kazakhstan | — | 28th — 2014 Tiszaujvaros ITU Triathlon World Cup |
| | 🇷🇺Russia | — | DNF — 2013 Istanbul ITU Triathlon European Cup |
| | 🇫🇮Finland | — | — |
| | 🇦🇺Australia | — | DNF — 2019 IRONMAN 70.3 Busselton |
| | 🇬🇹Guatemala | — | — |
| | 🇳🇿NZ | — | — |
| | 🇵🇦Panama | — | 6th — 2025 World Triathlon Development Regional Cup Durazno |
| | 🇨🇦Canada | — | 18th — 2008 IRONMAN Canada |
| | 🇨🇦Canada | — | DNF — 2016 Madrid ETU Triathlon European Cup |
| | | — | 15th — 2017 IRONMAN 70.3 Taiwan |
| | 🇨🇾Cyprus | — | 18th — 2011 Alaminos ETU Triathlon Small States of Europe Championships |
| | 🇬🇧Great britain | — | 1st — 2025 World Triathlon Championship Finals Wollongong |
| | 🇿🇦South africa | — | 52nd — 2025 World Triathlon Championship Finals Wollongong |
| | 🇸🇰Slovakia | — | 6th — 2018 SVK Triathlon Junior National Championships |