Section 1 of 2
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | WILLIAMSON, Dylan | JR | Webster Groves High School | NT | Unverified: |
| 2 | HOEFT, MATTHEW | 9 | Lafayette (Wildwood) High School | 49.96 | Verified |
| 3 | KOSTOS, Maximus | SO | Kirkwood High School | 49.02 | Verified |
| 4 | MURASKI, Elias | JR | Kirkwood High School | 49.41 | Verified |
| 5 | SEWELL, Nathaniel | JR | St. Louis University High School | 50.22 | Unverified: |
| 6 | WILLIAMS, Cannon | SO | Clayton High School | NT | Unverified: |
Section 2 of 2
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | VEHIGE, MATTHEW | 9 | Lafayette (Wildwood) High School | 48.26 | Verified |
| 2 | GLASER, Joseph | JR | Lindbergh High School | 47.02 | Unverified: Rockwood Summit Corey Siebert |
| 3 | HAWTHORNE, Dylan | SO | Ladue Horton Watkins High School | 44.00 | Unverified: |
| 4 | STEVENS, Robert | SR | St. Louis University High School | 46.42 | Unverified: |
| 5 | WESTRICH, Tyler | 9 | Lindbergh High School | 47.71 | Verified |
| 6 | HRUZ, Christopher | SR | Vianney High School | 49.01 | Verified |
