| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Vera, Diego (9)
|
FGASC |
49.04 |
38.99 |
-10.05 |
| 2 |
Meneses, Matthew L (8)
|
FGMACM |
41.59 |
39.50 |
-2.09 |
| 3 |
Almuina, Brandon * (8)
|
FGMACM |
43.38 |
40.78 |
-2.60 |
| 4 |
Estrada, Ian (8)
|
FGNMST |
41.86 |
45.89 |
4.03 |
| 5 |
Pinkusevich, Aaron (8)
|
FGMSAT |
57.04 |
47.24 |
-9.80 |
| 6 |
Khasanov, Fail (9)
|
FGMSAT |
51.83 |
47.45 |
-4.38 |
| 7 |
Moreira, Joshua (9)
|
FGMCDA |
53.87 |
50.82 |
-3.05 |
| 8 |
Barguez, Jacob A (10)
|
FGMACM |
50.53 |
51.70 |
1.17 |
| 9 |
Sanchez, Samuel (9)
|
FGASC |
51.30 |
52.22 |
0.92 |
| 10 |
Novo, Sebastian A (10)
|
FGAJSC |
48.92 |
53.73 |
4.81 |
| 11 |
Ellis, Jacob J (9)
|
FGRANS |
|
55.31 |
- |
| 12 |
Rocheleau, Michael A (10)
|
FGRANS |
|
55.65 |
- |
| 13 |
Nery-Martins, Luca (8)
|
FGOSC |
1:02.23 |
57.84 |
-4.39 |
| 14 |
Gentilhomme, Marcus C (9)
|
FGFLA |
|
1:02.18 |
- |
| 15 |
Bryant, William E (9)
|
FGAJSC |
57.98 |
1:02.94 |
4.96 |
| 16 |
Lopez, Henry G (9)
|
FGNMST |
|
1:03.34 |
- |
| 17 |
Pinkhasov, David A (7)
|
FGMSAT |
|
1:03.42 |
- |
|
Duran, Andy E (7)
|
FGMACM |
|
DQ |
- |
|
Rodriguez, Lorenzo E (9)
|
FGMCDA |
|
DQ |
- |
|
McKenna, Oliver E (10)
|
FGEA |
|
DQ |
- |
|
Podushkin, Leonard (7)
|
FGMSAT |
|
DQ |
- |
|
Batum, Aras (9)
|
FGMBS |
57.21 |
NS |
- |
|
Rubenstein, Elad (7)
|
UNAT |
|
NS |
- |