| Lane | Athlete | Team | Seed |
|---|---|---|---|
| 3 | WIESENTHAL, David | Chicago (CICS/Northtown) | NT |
| 4 | FEENEY, Ryan | Chicago (Northside) | NT |
| 5 | HUDSON, David | Chicago (Ogden International) | NT |
| Lane | Athlete | Team | Seed |
|---|---|---|---|
| 1 | MORALES, Rafeal | Chicago (Marine Leadership Academy) | 1:18.80 |
| 2 | CORREA, Adrian | Chicago (Noble Street Charter) | 1:11.40 |
| 3 | BURGOS, Almando | Chicago (Noble Street Charter) | 1:06.00 |
| 4 | PEREZ, Edwin | Chicago (Marine Leadership Academy) | 1:03.80 |
| 5 | QUINTANA, Edgar | Chicago (Noble/Rauner) | 1:05.70 |
| 6 | HOLMES, Jared | Chicago (Intrinsic Charter-Downtown Campus) | 1:10.20 |
| 7 | RAMIREZ, Andriy | Chicago (CICS/Northtown) | 1:14.10 |
| Lane | Athlete | Team | Seed |
|---|---|---|---|
| 1 | ALVARENGA, Eric | Chicago (St. Patrick) | 1:01.80 |
| 2 | SARPONG, Nathan | Chicago (Intrinsic Charter-Downtown Campus) | 59.14 |
| 3 | LASANA, Clarence | Chicago (Noble/ITW Speer) | 58.42 |
| 4 | HERNANDEZ, Luis | Chicago (Noble/Rauner) | 56.66 |
| 5 | PYDYCH, Maximilian | Chicago (St. Patrick) | 57.77 |
| 6 | ARMENTA, Rafael | Chicago (Noble/ITW Speer) | 58.95 |
| 7 | SARPONG-ADJAPONG, Gideon | Chicago (Noble/Muchin) | 1:00.60 |
| 8 | PRATT, Manuel | Chicago (Ogden International) | 1:03.60 |
| Lane | Athlete | Team | Seed |
|---|---|---|---|
| 1 | BEEBE, William | Chicago (DePaul College Prep) | 54.84 |
| 2 | CASTETTE, Aidan | Chicago (DePaul College Prep) | 54.04 |
| 3 | HU-LOWENTHAL, Aiden | Chicago (Payton) | 52.38 |
| 4 | RAINVILLE, Evan | Chicago (Payton) | 49.34 |
| 5 | DIAKITE, Ibrahim | Chicago (Sullivan) | 52.28 |
| 6 | ALONGE-OLUDAYE, Oluwatunmise | Chicago (Sullivan) | 53.60 |
| 7 | CORTES, Alexis | Chicago (Prosser) | 54.41 |
| 8 | VARGAS, Esteban | Chicago (Northside) | 55.26 |