| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | TUCKER, Gavin | FR | Northwest (Cedar Hill) High Scho | 2:37.28 | Verified |
| 2 | SCHELLER, William | SO | Northwest (Cedar Hill) High Scho | 2:37.37 | Verified |
| 3 | RAFALOWSKI, Brandon | JR | Liberty (Wentzville) High School | 2:39.72 | Unverified: |
| 4 | BESOWSHEK, Tyler | FR | Liberty (Wentzville) High School | 2:39.87 | Unverified: |
| 5 | JONES, Alexander | FR | Hazelwood East High School | 2:40.12 | Verified |
| 6 | TAYLOR, Joshua | FR | Hazelwood East High School | 2:40.85 | Verified |
| 7 | WILLICK, Ari | JR | Ladue Horton Watkins High School | 2:43.65 | Verified |
| 8 | WILLIAMS, Serjei | SR | Riverview Gardens High School | 2:50.03 | Verified |
| 9 | REDD, Nasir | JR | Riverview Gardens High School | 2:50.93 | Verified |
| 10 | DESHAY, Devonte | JR | Hazelwood Central High School | 3:07.80 | Verified |
| 11 | GILBONIO, Enzo | SO | Maplewood-Richmond Hts. High Sch | NT | Unverified: |
| 12 | POWELL, Mario | FR | Riverview Gardens High School | NT | Unverified: |
| 13 | RAMADAN, Yussif | JR | Ft. Zumwalt North High School | NT | Unverified: |
| 14 | ZHANG, Jin | FR | Ladue Horton Watkins High School | NT | Unverified: |
| 15 | GHEORGHIAN, Kaiden | JR | Ladue Horton Watkins High School | NT | Unverified: |
| 16 | KEARNS, Daniel | SO | Lafayette (Wildwood) High School | NT | Unverified: |
| 17 | DICK, Elliott | FR | Maplewood-Richmond Hts. High Sch | NT | Unverified: |
| 18 | MARSHALL, Noah | FR | Ft. Zumwalt North High School | NT | Unverified: |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | NISSEN, Tyler | FR | Seckman High School | 2:12.00 | Unverified: |
| 2 | RICHMAN, George | SO | Kirkwood High School | 2:14.10 | Unverified: |
| 3 | ALSOP, Sagan | JR | Lafayette (Wildwood) High School | 2:14.43 | Verified |
| 4 | SCHUTTE, Dominic | JR | Seckman High School | 2:16.24 | Verified |
| 5 | SAINATHAN, Sanjiv | JR | Lafayette (Wildwood) High School | 2:16.40 | Unverified: |
| 6 | BARTON, Jacob | FR | Marquette High School | 2:17.00 | Unverified: |
| 7 | LARSON, Ethan | SR | Parkway West High School | 2:18.00 | Unverified: |
| 8 | SMITH, Sebastian | SO | Seckman High School | 2:18.19 | Verified |
| 9 | FLEMING, Ian | JR | Marquette High School | 2:19.00 | Unverified: |
| 10 | PFEIFFER, Landon | FR | Liberty (Wentzville) High School | 2:19.86 | Unverified: |
| 11 | LARSON, Charles | FR | Kirkwood High School | 2:21.21 | Unverified: |
| 12 | BURKE, ROYCE | SO | Marquette High School | 2:24.00 | Unverified: |
| 13 | TOLES, Larry | SR | Hazelwood Central High School | 2:25.46 | Verified |
| 14 | SADLER, Nathaniel | JR | Northwest (Cedar Hill) High Scho | 2:25.98 | Verified |
| 15 | PIRRUNG, Brayden | JR | Ft. Zumwalt North High School | 2:31.20 | Verified |
| 16 | PICHON, Tyler | JR | Hazelwood East High School | 2:32.37 | Verified |
| 17 | HUNTER, Arius | FR | Hazelwood Central High School | 2:35.72 | Verified |
| 18 | RYAN, Paul | SO | Maplewood-Richmond Hts. High Sch | 2:36.81 | Verified |