| Lane | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|
| 3 | MCDOUGALL, Jordan | SO | Bensenville (Fenton) | NT |
| 4 | WILSON, Jordan | SO | Bensenville (Fenton) | 51.09 |
| 5 | REYES, Mario | SO | Franklin Park-Northlake (Leyden) | NT |
| 6 | CANO, Juan | JR | Franklin Park-Northlake (Leyden) | NT |
| Lane | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|
| 1 | SOLIS, Isaiah | SR | Elmwood Park | 49.54 |
| 2 | VONIC, Nathan | JR | Hampshire | 48.34 |
| 3 | LATTA, Aidan | JR | Lake Zurich | 44.74 |
| 4 | SMITHING, William | SO | Riverside (R.-Brookfield) | 44.39 |
| 5 | COOPER, Benjamin | SR | Lake Zurich | 44.54 |
| 6 | ABREU, Sebastian | SR | Hampshire | 45.34 |
| 7 | PEDERSON, Jackson | SR | Elmwood Park | 49.08 |
| 8 | SANDUSKI, Steven | SR | Riverside (R.-Brookfield) | 50.34 |