Jeff Mattas has 4 recorded races from Shorewood, Illinois, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-08-23 | 2025 Chicago Triathlon Olympic | Ultra Marathon | 3:01:37 | 1047 |
| 2024-08-24 | 2024 Chicago Triathlon International | Ultra Marathon | 3:00:59 | 882 |
| 2023-08-27 | 2023 Chicago Triathlon International | Ultra Marathon | 2:39:38 | 1684 |
| 2022-08-28 | 2022 Chicago Triathlon International - Individual | Ultra Marathon | 3:21:06 | 1555 |