| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Wilson, Evan (12)
|
FGMCDA |
1:00.53 |
1:01.63 |
1.10 |
| 2 |
Morel, Julien (11)
|
FGUN |
|
1:14.00 |
- |
| 3 |
Murdocca, Matteo M (12)
|
FGEA |
1:13.64 |
1:15.56 |
1.92 |
| 4 |
Ferrari, Anthony G (12)
|
FGMBS |
1:19.63 |
1:17.36 |
-2.27 |
| 5 |
Gonzalez, Santiago A (12)
|
FGCM |
|
1:13.45 |
- |
| 5 |
Juodzevicius, Joel (11)
|
FGCM |
1:18.60 |
1:20.48 |
1.88 |
| 6 |
Quintana, Jaime (12)
|
FGSOFL |
|
1:21.12 |
- |
| 7 |
Choque, Thomas A (11)
|
FGMBS |
1:27.07 |
1:21.20 |
-5.87 |
| 8 |
Esser, Erick (11)
|
FGSOFL |
1:19.38 |
1:21.52 |
2.14 |
| 9 |
Canellas, Kai (12)
|
FGMCDA |
|
1:21.76 |
- |
| 10 |
Perdigon, Julien A (12)
|
FGSOFL |
|
1:41.54 |
- |
| 11 |
Fachetti-Carvhalo, Gabriel (11)
|
FGASC |
1:46.38 |
1:52.15 |
5.77 |
|
Salazar, Emiliano (11)
|
FGMACM |
|
NS |
- |
|
Singh, Aarin (11)
|
FGMCDA |
1:34.50 |
NS |
- |