| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 2 | POSKIN, Gage | SR | Northwest (Cedar Hill) High Scho | 49.74 | Verified |
| 3 | SMITH, Hannon | SR | Kirkwood High School | 46.50 | Unverified: |
| 4 | KING, Carllion | SO | Lafayette (Wildwood) High School | 45.62 | Verified |
| 5 | RELLIHAN, Matthew | SR | Seckman High School | 45.98 | Verified |
| 6 | HOLLINS, James | JR | Riverview Gardens High School | 48.98 | Verified |
| 7 | SHELTON, Jerrion | JR | Riverview Gardens High School | NT | Unverified: |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | STITH, SANTINO | SO | Lafayette (Wildwood) High School | 44.82 | Verified |
| 2 | SHIPLEY, Brendan | SR | Ft. Zumwalt North High School | 44.59 | Verified |
| 3 | RILEY, Joseph | JR | Northwest (Cedar Hill) High Scho | 43.84 | Verified |
| 4 | DODD, Brandin | SR | Poplar Bluff High School | 43.30 | Verified |
| 5 | MAUCK, Matthew | SO | Liberty (Wentzville) High School | 43.55 | Verified |
| 6 | ANDERSON, DA'SHAUN | JR | Marquette High School | 44.24 | Unverified: |
| 7 | SANDERS, Lynden | JR | Ft. Zumwalt North High School | 44.61 | Verified |
| 8 | BURTON, Derek | SO | Poplar Bluff High School | 44.92 | Verified |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | WILLIAMS, Ladarius | SR | Hazelwood East High School | 43.10 | Verified |
| 2 | MAXWELL, Josiah | SR | Seckman High School | 42.58 | Verified |
| 3 | HAWTHORNE, Dylan | SR | Ladue Horton Watkins High School | 42.19 | Verified |
| 4 | COLEMAN, Kelvin | JR | Hazelwood Central High School | 40.22 | Verified |
| 5 | HUNTER, Brian | SR | Hazelwood Central High School | 42.13 | Verified |
| 6 | MOORE, Donteaus | SR | Parkway West High School | 42.27 | Verified |
| 7 | ROBINSON, Larry | SO | Kirkwood High School | 43.06 | Verified |
| 8 | WILLIAMS, ROBERT | JR | Marquette High School | 43.24 | Verified |