| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | SMITH, Randy | FR | Northwest (Cedar Hill) High Scho | NT | |
| 2 | VAHEY, Camden | FR | Vianney High School | 1:07.12 | Verified |
| 3 | WEINBERG, Gideon | FR | Kirkwood High School | 1:03.52 | Verified |
| 4 | BERGMANN, John | FR | Kirkwood High School | 1:04.55 | Verified |
| 5 | SEITZ, John | FR | St. Louis University High School | 1:07.74 | Verified |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | SAMMLER, Jordan | FR | Kirkwood High School | 1:02.26 | Verified |
| 2 | SMITH, Bailey | FR | Northwest (Cedar Hill) High Scho | 59.03 | Verified |
| 3 | D.K.) WEAVER, DeKarai | FR | Chaminade College Preparatory Sc | 57.24 | Verified |
| 4 | PENBERTHY, Micah | FR | Northwest (Cedar Hill) High Scho | 58.34 | Verified |
| 5 | STROHSCHEIN, Nicklas | FR | St. Louis University High School | 1:00.03 | Verified |
| 6 | JOHNSON, Dayton | 8 | Chaminade College Preparatory Sc | 1:02.81 | Verified |