| Lane | Athlete | Yr. | Team | Seed | 
|---|---|---|---|---|
| 2 | ZAVALA, Alejandro | FR | Bensenville (Fenton) | NT | 
| 3 | HERNANDEZ, Jorge | FR | Franklin Park-Northlake (Leyden) | NT | 
| 4 | GONZALEZ, Brian | SO | Franklin Park-Northlake (Leyden) | 1:04.99 | 
| 5 | KRYTSUN, Taras | FR | Elmwood Park | 1:06.74 | 
| 6 | ROSSI, Nathan | SO | Hampshire | NT | 
| Lane | Athlete | Yr. | Team | Seed | 
|---|---|---|---|---|
| 1 | MIRANDA, Carlos | SO | Riverside (R.-Brookfield) | 1:00.40 | 
| 2 | MORGADO, Yulien | FR | Des Plaines (Maine West) | 59.91 | 
| 3 | STRAUSS, Connor | FR | Lake Zurich | 58.44 | 
| 4 | ADAMS, Lincoln | SO | Lake Zurich | 58.14 | 
| 5 | ESCARPITA, Justus | FR | Elmwood Park | 58.24 | 
| 6 | TERRIQUEZ, Charlie | FR | Hampshire | 58.54 | 
| 7 | KAHLE, Asa | FR | Riverside (R.-Brookfield) | 1:00.20 | 
| 8 | MARTINEZ, Ernie | SO | Des Plaines (Maine West) | 1:01.35 |