Section 1 of 2
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | GREEN, Marquavious | 9 | Ft. Zumwalt West High School | NT | Unverified: |
| 2 | LEONARD, Samuel | SR | St. Charles High School | 1:02.33 | Verified |
| 3 | WILLIAMS, Javier | SR | St. Charles West High School | 1:02.00 | Unverified: FHC Quad |
| 4 | BEHRENS, Aaron | SR | St. Charles West High School | 1:01.00 | Unverified: FHC Quad |
| 5 | WILLIAMS, James | SO | Ft. Zumwalt East High School | 1:01.94 | Verified |
| 6 | CALMESE, Deondrae | JR | St. Charles High School | 1:02.12 | Verified |
| 7 | CLARK, Isaiah | 9 | Ft. Zumwalt South High School | NT | Unverified: |
| 8 | WUELLNER, Peter | JR | Chaminade College Preparatory Sc | NT | Unverified: |
Section 2 of 2
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | VOGEL, Alex | SR | Francis Howell Central High Scho | NT | |
| 2 | COLEMAN, Tyler | SR | Ft. Zumwalt West High School | 55.96 | Unverified: |
| 3 | BATES, Owen | 9 | Ft. Zumwalt South High School | 55.28 | Verified |
| 4 | CAVLOVICH, Casey | SR | Chaminade College Preparatory Sc | 53.33 | Verified |
| 5 | BENHARDT, Jackson | JR | Troy Buchanan High School | 54.33 | Verified |
| 6 | LOLLAR, Ethan | 9 | Troy Buchanan High School | 55.70 | Verified |
| 7 | DEWITT, Xander | 9 | Ft. Zumwalt East High School | 56.47 | Verified |
| 8 | MCDEVITT, Rolen | SO | Francis Howell Central High Scho | 59.64 | Verified |
