| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 1 | CHICAIZA, Jeff | SR | Hoffman Estates (Conant) | NT | |
| 2 | TOPOR, Chris | JR | Elk Grove Village (E.G.) | NT | |
| 3 | MATEI, Anthony | SR | Buffalo Grove | 1:01.30 | |
| 4 | SPROAT, Ryan | SR | Hoffman Estates (Conant) | NT | |
| 5 | HARRIS, Dy 'zerrion | SO | Wheeling | NT | |
| 6 | TSUCHIYA, Kouosuke | JR | Elk Grove Village (E.G.) | NT | 
| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 1 | BRYANT, Tim | SR | Hoffman Estates (H.S.) | 59.44 | |
| 2 | DECKER, David | SR | Palatine (Fremd) | 58.85 | |
| 3 | CARLSON, Matt | SR | Rolling Meadows | 58.03 | |
| 4 | PEREZ, Chris | JR | Palatine (H.S.) | 58.46 | |
| 5 | JOHNSON, Avery | JR | Barrington | 59.34 | |
| 6 | BERNARDO, Anthony | SO | Buffalo Grove | 59.50 | 
| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 1 | ANDREJEK, Dom | SR | Rolling Meadows | 57.24 | |
| 2 | BERGER, Daylan | SR | Wheeling | 54.92 | |
| 3 | FARDELLA, Nic | SR | Mt. Prospect (Prospect) | 54.44 | |
| 4 | JAIMES, Marcos | SR | Schaumburg | 54.50 | |
| 5 | DHARWADKAR, Miheer | JR | Palatine (Fremd) | 57.23 | |
| 6 | DRAGE, Joseph | SR | Barrington | 57.94 | 
| Lane | Athlete | Yr. | Team | Seed | Note | 
|---|---|---|---|---|---|
| 1 | SINGH, Preetpaul | SR | Hoffman Estates (H.S.) | 54.05 | |
| 2 | MABRY, Gentry | SR | Palatine (H.S.) | 53.82 | |
| 3 | BALENDA, Dominik | JR | Mt. Prospect (Prospect) | 50.42 | |
| 4 | ALONSO, Froylan | JR | Arlington Heights (Hersey) | 53.72 | |
| 5 | VALENCIA, Alex | SO | Schaumburg | 54.04 | |
| 6 | NISHIMURA, Aidan | JR | Arlington Heights (Hersey) | 54.40 |