| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Martin, Dario (15)
|
FGOSC |
54.93 |
54.99 |
0.06 |
| 2 |
Efimov, Nikita (15)
|
FGOSC |
57.05 |
56.21 |
-0.84 |
| 3 |
Wilson, Benjamin (18)
|
FGMCDA |
56.91 |
57.28 |
0.37 |
| 4 |
Phung, Ben (17)
|
FGNMST |
59.69 |
1:01.20 |
1.51 |
| 5 |
Phung, Tim (17)
|
FGNMST |
1:00.40 |
1:02.33 |
1.93 |
| 6 |
Lucas, Jesus M (17)
|
FGNMST |
1:02.99 |
1:03.13 |
0.14 |
| 7 |
Besharat, Aria (15)
|
FGNMST |
1:01.38 |
1:04.65 |
3.27 |
| 8 |
Mauriello, Bruno (16)
|
FGRANS |
1:07.98 |
1:07.43 |
-0.55 |
| 9 |
Garcia, Riley J (17)
|
FGCANE |
1:09.48 |
1:08.22 |
-1.26 |
| 10 |
Desrouleaux, Joshua D (17)
|
FGNMST |
1:09.62 |
1:10.14 |
0.52 |
| 11 |
Diaz, Louis A (17)
|
FGAJSC |
|
1:15.03 |
- |
| 12 |
Miganard, Gabriel (15)
|
FGMBS |
|
1:15.72 |
- |
| 13 |
Arnedo, Federico J (15)
|
FGNMST |
1:14.13 |
1:16.42 |
2.29 |
| 14 |
Hernandez, Emmanuel E (15)
|
FGMACM |
1:18.10 |
1:17.68 |
-0.42 |
| 15 |
Billadron, Lucas W (16)
|
FGMBS |
|
1:18.09 |
- |
| 16 |
Cavanzo, Matias A (15)
|
FGEA |
|
1:20.07 |
- |
| 17 |
Equizi, Giorgio (16)
|
FGMCDA |
|
1:20.29 |
- |
|
Miskevich, Ivan (16)
|
FGOSC |
1:04.57 |
DQ |
- |