| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Pettit, Collin S (17)
|
MARAD |
49.62 |
50.25 |
0.63 |
| 2 |
Graham, Jackson T (16)
|
MALMAC |
50.06 |
50.71 |
0.65 |
| 3 |
Bochanski, Matthew (17)
|
MALMAC |
54.09 |
51.16 |
-2.93 |
| 4 |
Buitron, Christopher C (16)
|
MAWA |
48.74 |
51.78 |
3.04 |
| 5 |
Callahan, Liam (17)
|
MAWA |
54.11 |
51.95 |
-2.16 |
| 6 |
Branigan, Carter J (15)
|
MARAD |
52.65 |
53.84 |
1.19 |
| 7 |
Valdes, Jonathan G (15)
|
MAEAAC |
52.76 |
55.03 |
2.27 |
| 8 |
Young, Griffin R (16)
|
MAWA |
53.79 |
56.25 |
2.46 |
| 9 |
Kilroy, Ethan (15)
|
MAACAC |
|
1:02.74 |
- |
| 10 |
Dileo, Graham (16)
|
MAACAC |
1:01.72 |
1:05.20 |
3.48 |
|
Stoloff, Quentin A (15)
|
MALMAC |
|
DQ |
- |
|
Brennan, Kieran F (15)
|
MABSC |
|
NS |
- |
|
Imburgia, John J (16)
|
MACYL |
55.05 |
NS |
- |
|
Chalissery, Francis G (16)
|
MALMAC |
57.85 |
NS |
- |
|
Mlodzienski, Nicholas J (16)
|
MARAD |
51.48 |
NS |
- |
|
Sanchez, Carlos R (15)
|
MARAD |
1:02.10 |
NS |
- |