| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Vero, Jack V (10)
|
MRPBAC |
37.91 |
36.71 |
-1.20 |
| 2 |
Olarte, Alejandro J (10)
|
MRHVD |
40.02 |
39.65 |
-0.37 |
| 3 |
Dorner, Declan M (10)
|
MRNDAC |
45.22 |
47.20 |
1.98 |
| 4 |
Russell, Liam R (10)
|
MRNDAC |
51.06 |
47.92 |
-3.14 |
| 5 |
Mummery, Conor J (10)
|
MRNBS |
45.91 |
48.24 |
2.33 |
| 6 |
Russell, Edward W (10)
|
MRNDAC |
48.17 |
49.28 |
1.11 |
| 7 |
Xin, Alexander C (10)
|
MRAGMV |
54.65 |
50.94 |
-3.71 |
| 8 |
Townsend, Lukas J (9)
|
MRNBS |
49.06 |
51.13 |
2.07 |
| 9 |
Tarife, Grey P (10)
|
MRSSL |
|
51.39 |
- |
| 10 |
Decker, Caleb M (9)
|
MRPBAC |
1:05.13 |
58.94 |
-6.19 |
| 11 |
Mccafferty, Michael G (9)
|
MRWSSC |
|
59.75 |
- |
| 12 |
Tjoa, Nicholas Y (10)
|
MRSSL |
|
1:10.50 |
- |
|
Van Inwegen, Jonathan (9)
|
MRSSL |
|
DQ |
- |