| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Doyle, Charles (10)
|
MRCAS |
44.62 |
42.97 |
-1.65 |
| 2 |
Albergo, Frank V (10)
|
MRLIAC |
47.64 |
43.36 |
-4.28 |
| 3 |
Radoslovich, Steven A (9)
|
MRLIAC |
44.70 |
44.60 |
-0.10 |
| 4 |
Petrowsky, Trevor M (10)
|
MRLIAC |
46.53 |
47.22 |
0.69 |
| 5 |
Chang, Caiden (10)
|
MRLIAC |
48.32 |
48.28 |
-0.04 |
| 6 |
Mejia, Andres F (9)
|
MRLIAC |
48.51 |
50.56 |
2.05 |
| 7 |
Peng, Warren (9)
|
MRLIAC |
58.14 |
52.20 |
-5.94 |
| 8 |
Chau, Collin (9)
|
MRLIAC |
55.89 |
52.73 |
-3.16 |
| 9 |
Saporito, Eugene G (9)
|
MRPATS |
1:00.52 |
53.36 |
-7.16 |
| 10 |
Metrano, Wyatt J (10)
|
MRLIAC |
58.75 |
55.07 |
-3.68 |
| 11 |
Deneen, James E (9)
|
MRLIAC |
54.29 |
55.26 |
0.97 |
| 12 |
Hefelfinger, Graham W (9)
|
MRLIAC |
55.55 |
55.81 |
0.26 |
| 13 |
Oommen, Jacob (10)
|
MRLIAC |
55.34 |
57.09 |
1.75 |
| 14 |
Menwer, Adam N (10)
|
MRLIAC |
53.89 |
57.14 |
3.25 |
| 15 |
Duffy, James O (10)
|
MRLIAC |
1:00.27 |
59.92 |
-0.35 |
| 16 |
Bertrand, Andrew R (9)
|
MRLIAC |
1:01.90 |
1:00.33 |
-1.57 |
| 17 |
Tubul, Adam (10)
|
MRSSL |
1:07.24 |
1:04.63 |
-2.61 |
| 18 |
Sanchez, Romeo G (9)
|
MRLIAC |
1:06.81 |
1:17.84 |
11.03 |
| 19 |
Tjoa, Nicholas Y (10)
|
MRSSL |
NT |
DQ |
- |
| 20 |
Aquino, Josue A (10)
|
MRAPEX |
1:10.50 |
DQ |
- |