Heat 1 | Team | time | L | 4. Felix Sanchez | DOM | 49.42s | | 6. Raphael Fernandes | BRA | 49.53s | | 11.Yacnier Luis | CUB | 50.04s | | 13.Allan Ayala | GUA | 51.20s | PB | 14.Jonathan Gibson | PAN | 51.31s | PB | 15.Steve Delice | HAI | 51.51s | | 19.Mikel Thomas | TRI | 1:05.80 | |
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Heat 2 | Team | time | L | 1. Laron Bennett | USA | 49.09s | | 7. Bayano Kamani | PAN | 49.78s | SB | 8. Mahau Suguimati | BRA | 49.83s | | 9. Jonathan Williams | BIZ | 49.84s | | 10.Sergio Hierrezuelo | CUB | 49.90s | SB | 17.Luis Montenegro | CHI | 51.58s | |
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