| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 3 | KELLER, Graham | JR | Clayton High School | NT | Unverified: |
| 4 | GARRETT, Owen | 9 | Collegiate School of Medicine an | NT | Unverified: |
| 5 | LAWRENCE, Darien | 9 | Gateway High School | NT | Unverified: |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | SPENCER, Laron | 9 | Gateway High School | 1:00.26 | Verified |
| 3 | BLACK, Armond | SR | University City High School | 56.72 | Verified |
| 4 | TAO, Chris | 9 | John Burroughs High School | 55.99 | Verified |
| 5 | HUYETTE, Logan | SO | Clayton High School | 56.69 | Verified |
| 6 | TIMES, Ralph | SR | Confluence Prep Academy Charter | 57.94 | Verified |
| 7 | MILTON, Kevion | SO | Roosevelt High School | 1:00.99 | Verified |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | BROOKS, Charles | SO | Cardinal Ritter High School | 55.53 | Verified |
| 2 | ARMOUR-DOZIER, Isaac | SR | University City High School | 53.85 | Verified |
| 3 | JOHNSON, Bruce | SR | Cardinal Ritter High School | 50.74 | Verified |
| 4 | VIA, Gavin | JR | Ladue Horton Watkins High School | 49.59 | Verified |
| 5 | WILLIAMS, Tristan | JR | MICDS | 50.39 | Verified |
| 6 | LUCAS, Kahairi | SR | Ladue Horton Watkins High School | 51.88 | Verified |
| 7 | MUHAMMAD, Amir | JR | MICDS | 54.56 | Verified |
| 8 | GAMBLETON, Ryan | SR | Confluence Prep Academy Charter | 55.63 | Verified |