Ronald Jefferson Jefferson
BrazilActive- Born
- Mar 17, 1994 (32 years old)
- Events
- Half Marathon · 10 000 m
Ronald Jefferson Jefferson is a Brazil middle-distance runner, born on March 17, 1994. He competes primarily in the 1500m, 5000m and 10000m.
His personal bests include 3:55.21 in the 1500m, 14:38.95 in the 5000m, 30:02.74 in the 10000m, 1:05:48 in the Semi and 9:26.69 in the 3000mSt. He is currently active on the international athletics circuit, representing Brazil.
Personal best · Half Marathon1:05:48
2026 season best1:05:48May 30, 2026 · Porto Alegre
Personal best · 10 000 m30:02.74
Last competitionMaratona Internacional de Floripa FibraAug 30, 2026 · 2:24:53
As of Oct 28, 2026: Half Marathon 1:05:48, 10 000 m 30:02.74, 2026 season best 1:05:48 (May 30, 2026, Porto Alegre (BRA)) · Last competition: Maratona Internacional de Floripa Fibra, Aug 30, 2026, 2:24:53 · 32 years old
Personal bests
WA points calculator →Progression
| Season | Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|---|
| 2026 | 10Kilometr | 30:01 | – | Jun 5, 2026 | 10K da Cidade do Rio de Janeiro |
| 2026 | Semi | 1:05:48 | – | May 30, 2026 | Meia Maratona Internacional de Porto Alegre |
| 2026 | Marathon | 2:24:53 | – | Aug 30, 2026 | Maratona Internacional de Floripa Fibra |
| 2024 | 5000m | 15:21.62 | – | Nov 15, 2024 | JASC, Pista de Atletismo em Concordia, Concordia |
| 2024 | 10000m | 31:11.2h | – | May 25, 2024 | Campeonato Estadual Rio Loterias Caixa de Atletismo |
| 2024 | Semi | 1:07:37 | – | Jul 14, 2024 | Asics Golden Run RJ, Rio de Janeiro |
| 2021 | 5000m | 14:48.00 | – | Apr 18, 2021 | 1º Torneio Atletismo Paulista |
| 2021 | 10000m | 30:57.14 | – | Apr 17, 2021 | 1º Torneio Atletismo Paulista |