Jozef Sieminski has 4 recorded races from Skokie, Illinois, US.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-05-18 | 2025 Life Time Chicago Spring Half & 10K Half Marathon | Half Marathon | 2:24:08 | 3931 |
| 2024-09-29 | 2024 Life Time Chicago Half Marathon + 5K | Half Marathon | 2:24:00 | 4819 |
| 2023-09-24 | Life Time Chicago Half Marathon + 5K presented by HOKA | Half Marathon | 2:15:22 | 3918 |
| 2022-09-25 | HOKA Chicago Half Marathon & 5K 12.6 Mile | 2:10:16 | 4162 |