| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 3 | WILSON, Sean | Oceanside Collegiate Academy | 59.61 | Porter Gaud Home Meet #3 |
| 4 | LOICHINGER, Fletcher | North Charleston | 58.67 | |
| 5 | GORE, Caleb | Loris | 59.01 | North Myrtle Beach Home Meet #2 |
| 6 | WILLIAMS, Wesley | North Charleston | 1:00.78 |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | ARRICK, Teron | Aynor | 57.44 | |
| 2 | DUVALL, Joseph | Waccamaw | 56.75 | Region 5 AAA |
| 3 | PHIFER, Joshua | Aynor | 56.21 | |
| 4 | BEHAN, Evan | Hanahan | 55.50 | Cane Bay Track and Field Invitat |
| 5 | STRICKLAND, Micah | Loris | 56.19 | Region 5 AAA |
| 6 | ATKINSON, Hampton | Hanahan | 56.72 | SCHSL 3A - Region 6 |
| 7 | YANCEY, Jayden | Oceanside Collegiate Academy | 56.76 | Wildcat Classic |
| 8 | ALLEN, Kirkland | Oceanside Collegiate Academy | 57.79 | Porter Gaud Home Meet #3 |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | HARRIOTT, Joey | Oceanside Collegiate Academy | 54.61 | Porter Gaud Home Meet #2 |
| 2 | MIDDLETON, Matthew | North Charleston | 53.36 | |
| 3 | BROWN, Max | Hanahan | 52.32 | Wildcat Classic |
| 4 | LEVENTIS, Wade | Waccamaw | 48.40 | Georgetown High Meet #2 |
| 5 | JOYE, Jaekel | Georgetown | 51.61 | |
| 6 | NESMITH, Orian | Waccamaw | 52.65 | Region 5 AAA |
| 7 | HOWARD, William | Waccamaw | 54.06 | Beach Run Invitational |
| 8 | HOOKS MANIGAULT, Jaydon | Georgetown | 55.26 |