| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Amorim, Gabriel A (9)
|
FGBMSC |
42.62 |
44.27 |
1.65 |
| 2 |
Silva, John Brendon O (10)
|
FGWASC |
42.73 |
44.68 |
1.95 |
| 3 |
White, Oscar W (10)
|
FGHAFL |
|
46.23 |
- |
| 4 |
Domokos-Murphy, William R (8)
|
FGSAS |
|
46.96 |
- |
| 5 |
Lembit, Rocco M (9)
|
FGSAS |
48.13 |
49.33 |
1.20 |
| 6 |
Penaloza, Abraham G (9)
|
FGYSF |
53.71 |
49.40 |
-4.31 |
| 7 |
Pavlyuk, Maxim A (9)
|
FGECAC |
51.21 |
50.11 |
-1.10 |
| 8 |
Livsey, Brooks M (10)
|
FGYSF |
50.00 |
50.34 |
0.34 |
| 9 |
Sabocik, Aiden C (8)
|
FGLLL |
54.34 |
52.74 |
-1.60 |
| 10 |
Fernandez-Chung, Lucas (8)
|
FGASC |
1:02.89 |
53.76 |
-9.13 |
| 11 |
Arias, Adrian (10)
|
FGASC |
1:02.90 |
53.83 |
-9.07 |
| 12 |
Cote, Jordan W (10)
|
FGWASC |
54.03 |
54.19 |
0.16 |
| 13 |
Zakirov, Arthur (10)
|
FGWASC |
54.20 |
54.99 |
0.79 |
| 14 |
Diaz, Lorenzo (10)
|
FGASC |
|
57.32 |
- |
| 15 |
Gharib, Shahab B (9)
|
FGYSF |
|
1:02.13 |
- |
| 16 |
Cruz, Juan Carlos (10)
|
FGASC |
1:03.54 |
1:04.45 |
0.91 |
| 17 |
Vega, Braison (7)
|
FGASC |
|
1:05.48 |
- |
| 18 |
Eissner, Luka C (8)
|
FGECAC |
|
1:09.75 |
- |
|
Perez-Escobar, Sebastian (9)
|
FGYSF |
58.10 |
DQ |
- |
|
Raphael, Christian D (9)
|
FGLLL |
|
DQ |
- |
|
Perez, Joaquin E (10)
|
FGFAST |
1:02.83 |
DQ |
- |
|
Hernandez, Nicholas (9)
|
FGASC |
|
DQ |
- |