| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Levy, Nien N (18)
|
MRCOND |
45.00 |
47.97 |
2.97 |
| 2 |
Dwyer, Luke N (16)
|
MRCOND |
47.17 |
48.43 |
1.26 |
| 3 |
Coleman, Joseph T (17)
|
MRCOND |
47.81 |
49.04 |
1.23 |
| 4 |
Keahon, Lucas M (15)
|
MRCOND |
50.22 |
50.61 |
0.39 |
| 5 |
Manigbas, Benjamin (17)
|
MRCOND |
50.21 |
50.78 |
0.57 |
| 6 |
Driscoll, Colm E (15)
|
MRCOND |
49.71 |
51.07 |
1.36 |
| 7 |
Morris, Ryan M (16)
|
MRCOND |
51.25 |
51.22 |
-0.03 |
| 8 |
Kaminskiy, Anthony N (17)
|
MRNYS |
53.09 |
52.45 |
-0.64 |
| 9 |
Dafinoiu, Roy (15)
|
MRCOND |
50.21 |
53.09 |
2.88 |
| 10 |
Park, Joon D (15)
|
MRCOND |
55.24 |
54.99 |
-0.25 |
| 10 |
Cristoff-Gonzalez, Jordyn T (15)
|
MRNYS |
54.88 |
54.99 |
0.11 |
| 12 |
Hoffman, Ethan T (15)
|
MRRA |
58.21 |
55.28 |
-2.93 |
| 13 |
Gauthier, Michael C (14)
|
MRCOND |
59.88 |
58.28 |
-1.60 |
| 14 |
Shamis, Jonathan (15)
|
MRMPNY |
56.80 |
58.29 |
1.49 |
| 15 |
Payne, Tristan A (16)
|
MRRA |
58.57 |
1:00.53 |
1.96 |