| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | FOWLER, Nick | SR | Kennard-Dale | 54.14 | Unverified: York Suburban @ Kennard Dale |
| 2 | WINSLOW, Mason | SO | Montoursville Area | 54.05 | Unverified: |
| 3 | WANNOP, Elliott | SR | Williamsport Area | 53.48 | Verified |
| 4 | BUSS, Tyler | JR | Dallastown | 53.11 | Verified |
| 5 | ROWE, Clint | SR | Selinsgrove | 53.14 | Unverified: Selinsgrove vs Central Mt. |
| 6 | CLANTON, Lamar | SR | Bishop McDevitt | 53.84 | Verified |
| 7 | MAXWELL, Kyiese | JR | Bishop McDevitt | 54.08 | Verified |
| 8 | CARTER, Dameon | JR | Susquehannock | 54.44 | Unverified: Dover at Susquehannock |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | COOPER, Owen | SR | James Buchanan | 53.08 | Verified |
| 2 | KOCONIS, James | SR | Lewisburg Area | 52.98 | Unverified: Danville Vs. Lewisburg |
| 3 | DEVLIN, Dylan | SR | Central Columbia | 52.84 | Unverified: |
| 4 | HILLEGASS, Jonah | JR | Chestnut Ridge | 52.16 | Verified |
| 5 | HUGHES, Garrett | SR | Bishop McDevitt | 52.26 | Unverified: Trinity |
| 6 | RODRIGUEZ, Jonah | SR | York Suburban | 52.84 | Unverified: vs Kennard Dale 4/13/21 |
| 7 | STOUFFER, Seth | SO | Greencastle-Antrim | 53.04 | Unverified: Ga v Boiling 4-13 |
| 8 | DONLAN, Andrew | SR | Altoona Area | 53.09 | Verified |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | TOWNSEND, Quinton | JR | Palmyra | 51.94 | Verified |
| 2 | CARRUBBA, James | SR | Wallenpaupack | 51.84 | Unverified: |
| 3 | PRUY, Marcus | SR | Fairfield Area | 51.64 | Unverified: Bermudian Dual Meet |
| 4 | MANSFIELD, Anthony | JR | Palmyra | 51.54 | Unverified: PHS @ HHS 4-13-21 |
| 5 | CUTTING, Colson | SO | Cumberland Valley | 51.62 | Verified |
| 6 | NOVROCKI, Andrew | SR | Wyoming Valley West | 51.74 | Unverified: Dual Meet |
| 7 | VRANICH, Luka | JR | Lampeter Strasburg | 51.84 | Unverified: LS |
| 8 | KORKUTOVIC, Kenan | SR | Chambersburg | 52.05 | Unverified: 2021 Tim Cook Invitational |
| Lane | Athlete | Yr. | Team | Seed | Note |
|---|---|---|---|---|---|
| 1 | SUMMERS, Aydan | SR | Altoona Area | 51.02 | Verified |
| 2 | KRAVITZ, Colin | SO | North Pocono | 50.24 | Unverified: |
| 3 | JAISINGH, James | SR | Cumberland Valley | 48.97 | Verified |
| 4 | WILLIAMS, David | SR | Cumberland Valley | 48.59 | Verified |
| 5 | ZEIDERS, Logan | SR | York Suburban | 48.64 | Unverified: vs New Oxford 4/6/21 |
| 6 | SAINT-FLEUR, Stanley | SR | Dock Mennonite Academy | 49.70 | Verified |
| 7 | GRABILL, Joseph | SR | Hollidaysburg Area | 50.48 | Verified |
| 8 | BIGHAM, Travis | SR | Shippensburg | 51.34 | Verified |