| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | HAYDEN, Sean | SR | Winnetka (New Trier) | NT | |
| 3 | CHIU, Chun-Jung | JR | Winnetka (New Trier) | NT | |
| 4 | MALLIBAND, Matthew | SR | Winnetka (New Trier) | NT | |
| 5 | STOLYAR, Jacob | JR | Winnetka (New Trier) | NT | |
| 6 | CHIANG, Joseph | SR | Winnetka (New Trier) | NT |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | TENORIO, Anthony | SR | Chicago (Mather) | 51.56 | |
| 2 | RADEV, Alex | JR | Glenview (Glenbrook South) | 48.10 | |
| 3 | KOY, Connor | SR | Winnetka (New Trier) | 43.33 | |
| 4 | PANZER, Lennart | SR | Winnetka (New Trier) | 42.00 | |
| 5 | BUETTNER, Jaden | SR | Winnetka (New Trier) | 43.00 | |
| 6 | NWATU, Emmanuel | SR | Chicago (Mather) | 43.34 | |
| 7 | OSMAN, Jaron | SR | Glenview (Glenbrook South) | 48.34 | |
| 8 | GRANT, Judah | SR | Evanston (Beacon Academy) | 1:00.11 |