| Lane | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|
| 1 | KNIGHT, Evan | JR | Glen Ellyn (Glenbard West) | 1:00.32 |
| 2 | BROWN, Beu | SR | LaGrange (Lyons) | 57.64 |
| 3 | HASAPIS, Alexander | JR | Oak Park (O.P.-River Forest) | 55.16 |
| 4 | SHAH, Shiven | SR | Hinsdale (Central) | 56.58 |
| 5 | VAINIKOS, Socrates | JR | Glen Ellyn (Glenbard West) | 59.83 |
| 6 | IRBY, Jackson | JR | Downers Grove (North) | NT |
| Lane | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|
| 1 | GLENNON, Leo | JR | Elmhurst (York) | 54.08 |
| 2 | REMPFER, Jack | JR | LaGrange (Lyons) | 53.63 |
| 3 | KELLEY, Ian | SR | Oak Park (O.P.-River Forest) | 51.45 |
| 4 | GUERIN, Will | JR | Downers Grove (North) | 52.93 |
| 5 | VALESKI, Joey | JR | Elmhurst (York) | 53.97 |
| 6 | DYNIS, Max | SR | Hinsdale (Central) | 54.54 |