| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 2 | SZAMANDA, Paul | Downers Grove (South) | NT | |
| 3 | CHARTERS, Noah | Hinsdale South | 50.44 | |
| 4 | JONES, Anthony | Willowbrook | 48.38 | |
| 5 | CHAMBERS, Jon | Addison Trail | 48.51 | |
| 6 | SZALTIS, Jared | Franklin Park-Northlake (Ley | 52.35 |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | AWARE, Eustace | Hinsdale South | 48.04 | |
| 2 | PIMENTAL, Luis | Morton | 47.80 | |
| 3 | ROHLF, Austin | Addison Trail | 46.75 | |
| 4 | STOUT, Will | Willowbrook | 43.70 | |
| 5 | MUNOZ, David | Morton | 45.70 | |
| 6 | NEER, John | Downers Grove (South) | 46.80 | |
| 7 | AGUILAR, Anthony | Franklin Park-Northlake (Ley | 47.94 |