| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Perras, Alixander C (11)
|
ADWAVE |
42.48 |
43.74 |
1.26 |
| 2 |
Armendariz-Huang, Daniel P (11)
|
ADNTS |
44.58 |
44.16 |
-0.42 |
| 3 |
Hanna, Nathan C (12)
|
ADNHA |
|
44.91 |
- |
| 4 |
Araujo, Julian M (11)
|
ADNTS |
49.54 |
47.99 |
-1.55 |
| 5 |
Martin, Oliver M (12)
|
ADNTS |
53.98 |
53.10 |
-0.88 |
| 6 |
Attemann, Miles A (12)
|
ADNTS |
55.55 |
56.97 |
1.42 |
|
Choi, Eric J (12)
|
ADNTS |
56.00 |
DQ |
- |
|
Darie, Constantine V (11)
|
ADNTS |
1:05.44 |
DQ |
- |
|
Mahapatra, Haripriya (11)
|
ADNTS |
|
DQ |
- |
|
Tavernier, Isaac L (12)
|
ADNTS |
1:16.12 |
DQ |
- |
|
Tupper, Matthew J (12)
|
ADNTS |
50.00 |
DQ |
- |