| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Navarro, Gabriel V (10)
|
FGNMST |
38.17 |
37.23 |
-0.94 |
| 2 |
Lieberman, Oliver J (10)
|
FGMBS |
39.88 |
40.75 |
0.87 |
| 3 |
Kramer, Oscar P (9)
|
FGEA |
42.06 |
42.85 |
0.79 |
| 4 |
Frias, Adriano A (10)
|
FGMACM |
42.44 |
44.52 |
2.08 |
| 5 |
Blanca, Luis F (10)
|
FGMACM |
46.62 |
45.22 |
-1.40 |
| 6 |
Franchak, Tomas M (9)
|
FGCANE |
44.67 |
45.28 |
0.61 |
| 7 |
Bromley, Warren (10)
|
FGMBS |
46.92 |
47.11 |
0.19 |
| 8 |
Atkatz, Phoenix (9)
|
FGMBS |
48.27 |
49.05 |
0.78 |
| 9 |
Capote, Alejandro (10)
|
FGMS |
|
49.36 |
- |
| 10 |
Vega, Braison (9)
|
FGASC |
47.85 |
49.49 |
1.64 |
| 11 |
Barnett, Wyatt W (9)
|
FGMBS |
|
49.68 |
- |
| 12 |
Cohen, Tal E (10)
|
FGMBS |
49.12 |
50.77 |
1.65 |
| 13 |
Abreu, Abraham (9)
|
FGASC |
|
51.28 |
- |
| 14 |
Aguirre, Alessandro L (10)
|
FGMS |
|
51.31 |
- |
| 15 |
Garcia, Alan N (9)
|
FGMACM |
52.48 |
51.49 |
-0.99 |
| 16 |
Moreno, Juan E (10)
|
FGMBS |
51.86 |
51.79 |
-0.07 |
| 17 |
Ramirez, Nikolay (8)
|
FGMACM |
52.48 |
51.80 |
-0.68 |
| 18 |
Tolstov, Gregory (10)
|
FGNMST |
|
52.13 |
- |
| 19 |
Calejo, Aaron (10)
|
FGASC |
45.51 |
52.14 |
6.63 |
| 20 |
Ellis, Jacob J (9)
|
FGMS |
|
52.46 |
- |
| 21 |
Novo, Sebastian A (10)
|
FGAJSC |
|
56.55 |
- |
| 22 |
Bernten, Simon I (9)
|
FGAJSC |
|
58.03 |
- |
| 23 |
McKenna, Oliver E (9)
|
FGEA |
|
58.23 |
- |
| 24 |
Menard, Isaiah S (10)
|
FGEA |
|
58.57 |
- |
| 25 |
Rodriguez, Yoslan (9)
|
FGASC |
55.04 |
59.11 |
4.07 |
| 26 |
Pescher, Hugo G (10)
|
FGEA |
1:05.79 |
1:00.64 |
-5.15 |
| 27 |
Batum, Aras (9)
|
FGMBS |
57.57 |
1:00.66 |
3.09 |
| 28 |
Navarro-Sureda, Lucas (10)
|
FGASC |
|
1:00.93 |
- |
| 29 |
Gonzalez, Carlos (10)
|
FGASC |
44.18 |
1:01.58 |
17.40 |
| 30 |
Molina, Sebastian (9)
|
FGASC |
|
1:04.10 |
- |
|
Menendez, Samuel D (10)
|
FGMACM |
|
DQ |
- |
|
Palma, Javier M (9)
|
FGMACM |
|
NS |
- |
|
Sanchez, Samuel (9)
|
FGASC |
44.15 |
NS |
- |