| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 3 | POSKIN, Gage | SR | Northwest (Cedar Hill) High Scho | 47.51 | Verified |
| 4 | JOHNSTON, Kayden | SO | Pattonville High School | 45.44 | Verified |
| 5 | GERBER, Adam | SR | Northwest (Cedar Hill) High Scho | 47.19 | Verified |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | DETERDING, Charles | SR | Lindbergh High School | 43.00 | Verified |
| 2 | MAXWELL, Josiah | SR | Seckman High School | 41.89 | Verified |
| 3 | HUNTER, Brian | SR | Hazelwood Central High School | 41.19 | Verified |
| 4 | COLEMAN, Kelvin | JR | Hazelwood Central High School | 39.54 | Verified |
| 5 | ROBINSON, Larry | SO | Kirkwood High School | 40.76 | Verified |
| 6 | ANDERSON, DA'SHAUN | JR | Marquette High School | 41.42 | Verified |
| 7 | LEOPANDO, ROMEO | JR | Marquette High School | 42.45 | Verified |
| 8 | SMITH, Hannon | SR | Kirkwood High School | 44.56 | Verified |