| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Fernandez-Chung, Lucas N (10)
|
FGMACM |
38.71 |
40.15 |
1.44 |
| 2 |
Cannings, Oliver G (10)
|
FGAJSC |
|
41.89 |
- |
| 3 |
Escoto, Alejandro J (10)
|
FGGRSC |
45.55 |
43.49 |
-2.06 |
| 4 |
De Angulo, Andres A (9)
|
FGMS |
44.10 |
43.75 |
-0.35 |
| 5 |
Kokidko, Nicolas N (10)
|
UNAT |
|
44.67 |
- |
| 6 |
Bass, Alistair J (9)
|
FGSFTL |
50.30 |
44.84 |
-5.46 |
| 7 |
Fothergill, Liam (9)
|
FGMWA |
45.99 |
45.96 |
-0.03 |
| 8 |
Martinez, Leonardo * (10)
|
FGMACM |
56.21 |
46.28 |
-9.93 |
| 9 |
Cavani, Emiliano * (10)
|
UNAT |
51.27 |
46.31 |
-4.96 |
| 10 |
Adan, Daniel S (9)
|
FGMACM |
50.72 |
47.15 |
-3.57 |
| 11 |
Romeo, Lucas J (9)
|
FGMACM |
48.34 |
47.30 |
-1.04 |
| 12 |
Musiello, Bernardo P (10)
|
FGGRSC |
47.43 |
47.69 |
0.26 |
| 13 |
Negrin, Axel (10)
|
FGGRSC |
49.33 |
48.53 |
-0.80 |
| 14 |
Almuina, Brandon * (8)
|
FGMACM |
|
48.70 |
- |
| 15 |
Mantilla, Guillermo (8)
|
FGMWA |
48.22 |
48.86 |
0.64 |
| 16 |
Adan, Matthew S (8)
|
FGMACM |
54.05 |
49.82 |
-4.23 |
| 17 |
Ilonta, Nicolas P (8)
|
FGSFTL |
|
50.22 |
- |
| 18 |
Bravo, Antonio E (10)
|
FGSDST |
59.12 |
51.36 |
-7.76 |
| 19 |
Aguirre, Alessandro L (10)
|
FGMS |
|
52.20 |
- |
| 20 |
Macedo, Eric M (7)
|
FGGRSC |
54.66 |
52.28 |
-2.38 |
| 21 |
Meneses, Matthew L (8)
|
FGMACM |
|
54.01 |
- |
| 22 |
Barguez, Jacob A (9)
|
FGMACM |
|
54.54 |
- |
| 23 |
Riquenes, Matthew A (8)
|
FGMACM |
59.13 |
54.94 |
-4.19 |
| 24 |
Capote, Alejandro (10)
|
FGMS |
|
55.51 |
- |
| 25 |
Jang, Harrison (10)
|
FGMWA |
|
56.42 |
- |
| 26 |
Lenz Cesar, Guilherme B (9)
|
FGGRSC |
1:01.71 |
57.53 |
-4.18 |
| 27 |
Bernten, Simon I (9)
|
FGAJSC |
|
59.51 |
- |
| 28 |
Dogan, Alessandro (9)
|
FGSFTL |
|
1:00.08 |
- |
| 29 |
Novo, Sebastian A (10)
|
FGAJSC |
58.85 |
1:00.30 |
1.45 |
| 30 |
Vinod, Varun (8)
|
FGSDST |
|
1:00.65 |
- |
| 31 |
Boarato, Gabriel D (9)
|
FGGRSC |
1:01.72 |
1:02.69 |
0.97 |
| 32 |
Ponce, Sebastian M (8)
|
FGMACM |
|
1:05.74 |
- |
|
Nery-Martins, Luca (8)
|
FGOSC |
1:07.85 |
DQ |
- |
|
Pineda, Bryan * (8)
|
FGMACM |
|
NS |
- |
|
Garcia, Alan N (10)
|
FGMACM |
54.59 |
NS |
- |
|
Rincon, Jose I (10)
|
FGMWA |
44.99 |
NS |
- |
|
Guio, Santiago (8)
|
FGMWA |
48.78 |
NS |
- |
|
Piquet, Felipe A (8)
|
FGGRSC |
|
NS |
- |
|
Corrales, Francesco (9)
|
FGSFTL |
|
NS |
- |
|
Corte Hernandez, Gabriel A (10)
|
FGMWA |
51.90 |
NS |
- |
|
Ferenc, Hudson (9)
|
FGSFTL |
|
NS |
- |
|
Morales Harrison, Domingo A (7)
|
FGGRSC |
|
NS |
- |
|
Caraballo, Nicolas E (9)
|
FGGRSC |
|
NS |
- |
|
Bicerne, Bastiaan E (7)
|
FGMWA |
55.66 |
NS |
- |