| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Gonzalez, Nicolas (12)
|
FGUNRA |
30.88 |
28.80 |
-2.08 |
| 2 |
Franchak, Lucas S (11)
|
FGCANE |
30.36 |
29.41 |
-0.95 |
| 3 |
Coronel, Victor A (12)
|
FGMBS |
33.08 |
30.22 |
-2.86 |
| 4 |
Fanjul, Maximo A (12)
|
FGCANE |
33.89 |
31.59 |
-2.30 |
| 5 |
Atkatz, Skyler T (11)
|
FGMBS |
33.94 |
31.77 |
-2.17 |
| 6 |
Fernandez, Eduardo P (12)
|
FGUNRA |
32.82 |
32.65 |
-0.17 |
| 7 |
Dame, Jarrid W (11)
|
FGCANE |
32.85 |
33.15 |
0.30 |
| 8 |
Gonzalez, Daniel (12)
|
FGASC |
34.37 |
33.23 |
-1.14 |
| 9 |
Garcia, Nicholas (11)
|
FGCANE |
|
33.97 |
- |
| 10 |
Bachmann, Klaus S (11)
|
FGMBS |
38.42 |
34.57 |
-3.85 |
| 11 |
Delvat, Victor P (11)
|
FGCANE |
35.34 |
35.85 |
0.51 |
| 12 |
Kassin, Roberto J (12)
|
FGMCDA |
|
36.06 |
- |
| 13 |
Cruz, Lucas M (11)
|
FGCANE |
38.42 |
37.68 |
-0.74 |
| 14 |
Fachetti-Carvhalo, Gabriel (12)
|
FGASC |
40.43 |
38.33 |
-2.10 |
| 15 |
Vergel, Yusef (11)
|
FGASC |
|
39.07 |
- |
| 16 |
Lima, Enzo (11)
|
FGSGST |
47.13 |
39.84 |
-7.29 |
| 17 |
Diener, Seth D (12)
|
FGNMST |
45.30 |
41.51 |
-3.79 |
| 18 |
Sarypbekov, Kayrat E (11)
|
FGNMST |
49.30 |
41.71 |
-7.59 |
| 19 |
Mandel, Jack (11)
|
FGMCDA |
49.50 |
48.59 |
-0.91 |
|
Tampied, Mateo * (11)
|
FGCANE |
32.35 |
NS |
- |
|
Verdi, Luca L (11)
|
FGCANE |
36.47 |
NS |
- |
|
Sanchez, Manuel (12)
|
FGASC |
39.63 |
NS |
- |