| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Berko, Reuben L (9)
|
MRNDAC |
53.24 |
48.67 |
-4.57 |
| 2 |
Kui, Adam W (10)
|
MRRFAC |
52.70 |
49.41 |
-3.29 |
| 3 |
McCree-Salazar, Caden C (10)
|
MRHVD |
52.74 |
50.02 |
-2.72 |
| 4 |
Poellot, Reed C (10)
|
MRHVD |
1:03.28 |
56.58 |
-6.70 |
| 5 |
Olarte, Alejandro J (10)
|
MRHVD |
1:04.35 |
57.60 |
-6.75 |
| 6 |
Vega, Isidro R (9)
|
MRRFAC |
1:10.73 |
1:05.25 |
-5.48 |
| 7 |
He, Timothy J (6)
|
MRRFAC |
|
1:08.57 |
- |
|
Aragon Espinoza, Edahi (7)
|
MRMHH |
1:10.15 |
DQ |
- |
|
Fearon, Jamiel B (6)
|
MRMHH |
1:20.18 |
DQ |
- |
|
Touijar, Ali (9)
|
MRMHH |
1:10.08 |
DQ |
- |
|
Chiappetta, Paolo A (9)
|
MRRFAC |
|
DQ |
- |