Marathon best: 2:09:49 (Frankfurt 2017)
Welshman Dewi Griffiths broke 2:10 on his marathon debut in Frankfurt in 2017, but he has struggled with injuries ever since. He made his London Marathon debut in 2019 when he finished in 16th place. The Swansea Harrier is the second-fastest Welshman in history (behind Steve Jones) over both the marathon and half marathon distances. He has represented Great Britain on the roads and on cross-country.
London Marathon record
- 2019: 16th (2:11:46)
Other Abbott World Marathon Majors
Other major city marathons
- 2017: 5th (2:09:49)
Marathons in major championships