| Final A | Team | time | -time | L | React. | 50m | | 1. Albert Subirats | --- | 52.37s | | 2 | 0.73s | 2. | 24.54s | | 2. Eugene Godsoe | --- | 52.67s | 0.30s | 8 | 0.65s | 3. | 24.65s | | 3. Christopher Brady | --- | 52.95s | 0.58s | 5 | 0.70s | 1. | 24.53s | | 4. Shaune Fraser | --- | 52.96s | 0.59s | 6 | 0.71s | 5. | 24.98s | | 5. Omar Andres Pinzon | --- | 53.17s | 0.80s | 3 | 0.64s | 6. | 25.00s | | 6. Gabriel Mangabeira | --- | 53.24s | 0.87s | 4 | 0.65s | 8. | 25.46s | | 7. Benjamin Hockin | --- | 53.43s | 1.06s | 7 | 0.77s | 7. | 25.04s | | 8. Kaio Almeida | --- | 53.62s | 1.25s | 1 | 0.71s | 4. | 24.73s |
| Final B | Team | time | -time | L | React. | 50m | | 9. Octavio Alesi | --- | 54.15s | | 4 | 0.66s | 2. | 25.63s | | 10.Mauricio Rafael Fiol | --- | 54.26s | 0.11s | 5 | 0.53s | 1. | 25.23s | | 11.Marcos Barale | --- | 54.77s | 0.62s | 7 | 0.71s | 3. | 25.80s | | 12.Israel Duran | --- | 54.94s | 0.79s | 3 | 0.71s | 7. | 26.41s | | 13.Pablo Marmolejo | --- | 55.00s | 0.85s | 6 | 0.71s | 6. | 26.20s | | 14.Alex Hernandez | --- | 55.63s | 1.48s | 2 | 0.68s | 5. | 26.17s | | 15.Jose Lobo | --- | 56.10s | 1.95s | 1 | 0.74s | 4. | 26.15s |
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| World record: | | Pan American Games record: |
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| Qualification: | | Standard A: 54.6s | | Standard B: 56.2s |
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| Heats | Team | time | -time | L | React. | 50m | Heat | | 1. Gabriel Mangabeira | --- | 52.95s | | 5 | 0.67s | 1. | 24.74 s Heat 2. | | 2. Christopher Brady | --- | 53.67s | 0.72s | 5 | 0.72s | 4. | 25.43s | Heat 3. | | 3. Omar Andres Pinzon | --- | 53.76s | 0.81s | 3 | 0.66s | 2. | 25.38s | Heat 3. | | 4. Shaune Fraser | --- | 53.83s | 0.88s | 3 | 0.71s | 3. | 25.22s | Heat 1. | | 5. Albert Subirats | VEN | 53.84s | 0.89s | 4 | 0.76s | 3. | 25.41s | Heat 3. | | 6. Benjamin Hockin | --- | 53.87s | 0.92s | 3 | 0.81s | 4. | 25.50s | Heat 2. | | 7. Kaio Almeida | --- | 53.88s | 0.93s | 4 | 0.69s | 2. | 25.07s | Heat 2. | | 8. Eugene Godsoe | --- | 54.21s | 1.26s | 4 | 0.67s | 1. | 25.12s | Heat 1. | | 9. Octavio Alesi | --- | 54.51s | 1.56s | 5 | 0.60s | 2. | 25.17s | Heat 1. | | 10.Mauricio Rafael Fiol | --- | 54.56s | 1.61s | 2 | 0.55s | 1. | 25.31s | Heat 3. | | 11.Israel Duran | --- | 55.18s | 2.23s | 2 | 0.71s | 5. | 26.28s | Heat 1. | | 12.Pablo Marmolejo | --- | 55.27s | 2.32s | 2 | 0.66s | 3. | 25.35s | Heat 2. | | 13.Alex Hernandez | --- | 55.28s | 2.33s | 7 | 0.70s | 5. | 25.60s | Heat 3. | | 14.Marcos Barale | --- | 55.31s | 2.36s | 6 | 1.09s | 6. | 26.62s | Heat 3. | | 15.Jose Lobo | --- | 57.18s | 4.23s | 6 | 0.71s | 4. | 25.71s | Heat 1. | | -. Brett Fraser | CAY | DNS | | 6 | | | | Heat 2. | | -. Niall Roberts | --- | DNS | | 7 | | | | Heat 2. |
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