| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Rendon, Adrian O (10)
|
FGMWA |
35.20 |
34.42 |
-0.78 |
| 2 |
Crespo, Alejandro D (10)
|
FGMACM |
|
37.51 |
- |
| 3 |
Escoto, Alejandro J (10)
|
FGGRSC |
39.01 |
38.39 |
-0.62 |
| 4 |
Romeo, Lucas J (10)
|
FGMACM |
42.40 |
39.42 |
-2.98 |
| 5 |
Ives, Keagan R (10)
|
FGYSF |
42.08 |
40.55 |
-1.53 |
| 6 |
Linares, Jesus D (10)
|
FGMACM |
40.39 |
40.62 |
0.23 |
| 7 |
Gittelsohn, Collin D (9)
|
FGYSF |
42.83 |
41.47 |
-1.36 |
| 8 |
Guio, Santiago (9)
|
FGMWA |
43.87 |
41.71 |
-2.16 |
| 9 |
Vega, Braison (9)
|
FGUN-0 |
|
43.90 |
- |
| 10 |
Ives, Matthew S (10)
|
FGYSF |
46.76 |
46.76 |
0.00 |
| 11 |
Musiello, Bernardo P (10)
|
FGGRSC |
43.19 |
47.30 |
4.11 |
| 12 |
Lenz Cesar, Guilherme B (9)
|
FGGRSC |
49.19 |
51.14 |
1.95 |
| 13 |
Paredes, Alejandro L (10)
|
FGBMSC |
50.32 |
51.19 |
0.87 |
| 14 |
Hampton, Trent D (9)
|
FGGRSC |
55.30 |
55.96 |
0.66 |
| 15 |
Antonova, Oleksandr (9)
|
FGPST |
|
1:01.72 |
- |
|
Negrin, Axel (10)
|
FGGRSC |
40.52 |
DQ |
- |
|
Casas, Mateo (10)
|
FGMWA |
|
DQ |
- |
|
Barnett, Chace (10)
|
FGYSF |
49.87 |
DQ |
- |
|
Park, Brandon (10)
|
FGMWA |
48.71 |
NS |
- |
|
Remmelo, Max (10)
|
FGYSF |
|
NS |
- |