| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Politi, Gabriel (18)
|
FGAZFL |
1:03.60 |
1:01.90 |
-1.70 |
| 2 |
Diaz-Velasco, Esteban (18)
|
FGAZFL |
1:02.72 |
1:04.26 |
1.54 |
| 3 |
Lares, Andres A (17)
|
FGAZFL |
1:02.15 |
1:04.29 |
2.14 |
| 4 |
Iturbe, Julian Enrique (17)
|
FGAZFL |
|
1:05.42 |
- |
| 5 |
Capalbo, Ivan D (17)
|
FGAZFL |
1:11.15 |
1:10.11 |
-1.04 |
| 6 |
Fraiman, Elad (17)
|
FGAZFL |
1:19.80 |
1:13.13 |
-6.67 |
| 7 |
Moran, Bryan (18)
|
FGAZFL |
1:15.22 |
1:19.36 |
4.14 |
| 8 |
Drucker, Michael B (17)
|
FGPST |
1:33.22 |
1:28.73 |
-4.49 |
|
Serafim, Gabriel (17)
|
FGUN-A |
|
DQ |
- |
|
Maldonado, Angel (19)
|
FGAZFL |
1:07.26 |
NS |
- |
|
DaSilva, Pedro H (19)
|
FGCSSC |
|
NS |
- |