| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 2 | DAVIS, Donovan | Proviso East | 1:00.84 | |
| 3 | MOSELY, pablo | Addison Trail | 57.62 | |
| 4 | LASHLEY, Isiah | Hinsdale South | 57.24 | |
| 5 | HERNANDEZ, AlfONSO | Proviso East | 57.60 | |
| 6 | NOWACZYK, Kacper | Franklin Park-Northlake (Ley | 59.52 |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | MAYOR, Joseph | Franklin Park-Northlake (Ley | 56.54 | |
| 2 | SCUEFIELD, Jordan | Downers Grove (South) | 56.11 | |
| 3 | SMITH, Justin | Willowbrook | 55.48 | |
| 4 | ROMERO, Jose | Morton | 55.30 | |
| 5 | DAVIS, Justin | Hinsdale South | 55.39 | |
| 6 | JAVIER, Freddy | Morton | 56.10 | |
| 7 | CASELLA, Griffin | Downers Grove (South) | 56.51 | |
| 8 | ROSAS, Casey | Willowbrook | 56.55 |