Rank | Heat | Lane | Athlete | Result | Notes |
1 | 2 | 4 | Felipe Silva (BRA) | 1:04.72 | Q |
2 | 3 | 5 | Genaro Marias Britez (PAR) | 1:04.95 | Q |
3 | 3 | 4 | João Gomes Jr. (BRA) | 1:05.22 | Q |
4 | 1 | 4 | Jorge Murillo (COL) | 1:05.39 | Q |
5 | 3 | 3 | Renato David Fernandez (PAR) | 1:05.61 | Q |
6 | 2 | 5 | Lucas Eugenio Peralta (ARG) | 1:05.84 | Q |
7 | 3 | 6 | Martin Melconian (URU) | 1:05.85 | Q |
8 | 1 | 3 | Leopoldo Andara (VEN) | 1:05.89 | Q |
9 | 1 | 6 | Alex Javier Castro (ECU) | 1:06.15 | |
10 | 1 | 5 | Gonzalo Martin Acuna (ARG) | 1:06.30 | |
11 | 2 | 3 | Diego Bonilla (COL) | 1:06.72 | |
12 | 3 | 2 | Jose Guillermo Sierra (ECU) | 1:07.95 | |
13 | 3 | 7 | Diguan Pigot (SUR) | 1:08.79 | |
14 | 1 | 2 | Ricardo Pablo Salgado (CHI) | 1:09.10 | |
15 | 2 | 6 | Pedro Pablo Llamosas (PER) | 1:09.48 | |
16 | 2 | 2 | Erick Arturo Medina (PAN) | 1:09.90 | |
17 | 3 | 1 | Jordy Groters (ARU) | 1:11.12 | |
18 | 1 | 7 | Mario Sergio Chicot (PER) | 1:12.48 | |
| 2 | 7 | Jair Boerenveen (SUR) | DNS | |