| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Winkler, Kaii L (12)
|
FGEA |
36.98 |
34.46 |
-2.52 |
| 2 |
Plokhotnichenko, Ernest (11)
|
FGEA |
39.36 |
40.00 |
0.64 |
| 3 |
Roca, Peter M (11)
|
FGEA |
39.15 |
42.21 |
3.06 |
| 4 |
Esser, Erick (11)
|
FGSOFL |
43.84 |
44.02 |
0.18 |
| 5 |
Arias, Adrian (11)
|
FGASC |
45.80 |
44.77 |
-1.03 |
| 6 |
Morel, Julien (11)
|
FGUN |
|
45.75 |
- |
| 7 |
Murdocca, Matteo M (12)
|
FGEA |
49.83 |
48.62 |
-1.21 |
| 8 |
Fachetti-Carvhalo, Gabriel (11)
|
FGASC |
52.85 |
50.99 |
-1.86 |
| 9 |
Perdigon, Julien A (12)
|
FGSOFL |
|
1:02.75 |
- |
| 10 |
Ramirez, Juan-Esteban (12)
|
FGSOFL |
1:13.82 |
1:09.51 |
-4.31 |
|
Aball, Miguel (11)
|
FGASC |
|
DQ |
- |
|
Canellas, Kai (12)
|
FGMCDA |
|
DQ |
- |
|
Szulc, Dante (11)
|
FGMCDA |
|
DQ |
- |
|
Charnov, Maksim (11)
|
FGMSAT |
|
DQ |
- |
|
Salazar, Emiliano (11)
|
FGMACM |
|
NS |
- |