| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | GREEN, Kodey | 9 | St. Mary's (St. Louis) High Scho | 51.14 | Verified |
| 3 | RILEY, Joseph | SO | Northwest (Cedar Hill) High Scho | 47.83 | Verified |
| 5 | RYCENGA, Charles | JR | Vianney High School | 1:00.78 | Verified |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | SUZUKI, Yoshitaka | JR | Chaminade College Preparatory Sc | 47.14 | Verified |
| 2 | SMITH, Hannon | JR | Kirkwood High School | 45.34 | Verified |
| 3 | HOLLAND, Chris | SR | Northwest (Cedar Hill) High Scho | 43.70 | Verified |
| 4 | ROSS, Joseph | SO | Kirkwood High School | 44.78 | Verified |
| 5 | HURLEY, Lucas | 9 | Vianney High School | 45.83 | Verified |
| 6 | MAYER, Steffan | JR | St. Louis University High School | 47.27 | Unverified: Webster JV |
