| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | Palmeri, RJ | FR | Schaumburg | 47.80 | |
| 3 | Herrera, Cesar | JR | Addison Trail | 45.92 | |
| 4 | Alfano, Sal | SR | Franklin Park-Northlake (Leyden) | 45.23 | |
| 5 | Leonard, Eric | JR | Lombard (Glenbard East) | 45.39 | |
| 6 | Herringer, Nick | JR | Fenton | 47.61 | |
| 7 | Malig, Jomar | SO | Maine East | 51.20 |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | Silva, Ulysses | JR | Conant | 43.10 | |
| 2 | Sudberry, Michail | SR | Rock Island | 42.20 | |
| 3 | Howard, Pat | SR | Glenbard West | 41.60 | |
| 4 | Sanchez, James | SR | Minooka | 40.31 | |
| 5 | Rodriguez, PJ | SR | Hoffman Estates | 41.15 | |
| 6 | Brown, Brian | JR | Maine South | 42.00 | |
| 7 | Chisum, Darrell | SR | Zion-Benton | 42.85 | |
| 8 | Kowalski, Nathan | JR | Mt. Prospect (Prospect) | 43.11 |