| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | LYLES, Terrell | FR | Pattonville High School | NT | Unverified: |
| 2 | DELROSARIO, Raphael | FR | Lindbergh High School | NT | Unverified: |
| 3 | JOHNSON, Xander | FR | Seckman High School | 1:28.19 | Verified |
| 4 | WHITEHEAD, Kyler | FR | Hazelwood West High School | 1:07.63 | Verified |
| 5 | MILSON, Caleb | FR | Northwest (Cedar Hill) High Scho | 1:08.87 | Verified |
| 6 | BELL-HENDERSON, Luke | SR | Hazelwood West High School | NT | Unverified: |
| 7 | GARNER, Daveon | JR | Pattonville High School | NT | Unverified: |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | FREELS, William | FR | Lindbergh High School | 1:04.10 | Verified |
| 2 | DAVIS, Sir'Rickey | FR | Hazelwood West High School | 1:02.53 | Verified |
| 3 | HEAD, Nathan | FR | Seckman High School | 1:00.44 | Verified |
| 4 | RILEY, Joseph | JR | Northwest (Cedar Hill) High Scho | 1:00.00 | Unverified: |
| 5 | LINDSAY, Jessie | JR | Kirkwood High School | 1:00.00 | Unverified: |
| 6 | JEANMOUGIN, Nathaniel | SO | Lindbergh High School | 1:01.72 | Verified |
| 7 | TERRY, Kameron | JR | Seckman High School | 1:02.53 | Verified |
| 8 | WEBB, Kamal | JR | Kirkwood High School | 1:05.96 | Verified |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | COBBS, Charles | SO | Pattonville High School | 58.66 | Verified |
| 2 | BURNS, Maxwell | SO | Kirkwood High School | 57.81 | Verified |
| 3 | COTTLE, Ronald | SO | Hazelwood Central High School | 57.37 | Unverified: |
| 4 | JOHNSON, Damon | SO | Hazelwood Central High School | 56.72 | Unverified: |
| 5 | BERGOUDIAN, Bruno | SR | Marquette High School | 56.75 | Verified |
| 6 | SMALL, Christopher | JR | Marquette High School | 57.69 | Verified |
| 7 | PENBERTHY, Micah | FR | Northwest (Cedar Hill) High Scho | 58.31 | Verified |
| 8 | SMITH, Bailey | FR | Northwest (Cedar Hill) High Scho | 59.03 | Verified |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | VALENTINE WALLS, ETHAN | SR | Marquette High School | 56.69 | Verified |
| 2 | DERSTINE, Landon | FR | Marquette High School | 56.49 | Verified |
| 3 | FREUND, Milo | JR | Lindbergh High School | 54.88 | Verified |
| 4 | PULLIAM, Jayson | SR | Hazelwood West High School | 54.58 | Verified |
| 5 | WILLIAMS, Khamani | JR | Hazelwood Central High School | 54.79 | Verified |
| 6 | JOHNSON, Demetrius | SO | Pattonville High School | 56.27 | Verified |
| 7 | MITCHELL, Victor | SR | Hazelwood Central High School | 56.69 | Verified |
| 8 | ARANETA, Alexander | SO | Kirkwood High School | 56.70 | Verified |