Section 1 of 2
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 3 | HAWVER, Mason | JR | Parkway West High School | NT | Unverified: |
| 4 | KEITH, Mark | 9 | Northwest (Cedar Hill) High Scho | 53.55 | Verified |
| 5 | FLEMING, Ian | 9 | Marquette High School | NT | Unverified: |
Section 2 of 2
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | MINTER, Jordan | SO | Francis Howell North High School | 52.63 | Verified |
| 2 | GERBER, Adam | SO | Northwest (Cedar Hill) High Scho | 51.97 | Verified |
| 3 | KOSTOS, Maximus | SO | Kirkwood High School | 49.02 | Verified |
| 4 | JOVCESKI, Isaac | 9 | Lafayette (Wildwood) High School | 45.39 | Verified |
| 5 | VEHIGE, MATTHEW | 9 | Lafayette (Wildwood) High School | 48.26 | Verified |
| 6 | GJELVIK, Ethan | SO | Kirkwood High School | 50.58 | Verified |
| 7 | FENG, Ryan | SO | Parkway West High School | 52.24 | Verified |
