Rex Mangahas has 3 recorded races from Brgy San Roque, PHL.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-11-29 | 2025 Rock 'n' Roll Manila Half Marathon | Half Marathon | 2:31:49 | 969 |
| 2024-11-24 | 2024 Rock 'n' Roll Manila Half Marathon | Half Marathon | 2:36:06 | 1178 |
| 2023-11-26 | 2023 Rock 'n' Roll Manila Half Marathon | Half Marathon | 2:53:36 | 1619 |