Heat 3 | | time | | L | 1. Jonny Kulow | United States | 48.49s | QA | 5 | 4. Brooks Curry | United States | 48.65s | QA | 4 | 6. Breno Correia | Brazil | 49.05s | QB | 3 | 12.Edouard Fullum-Huot | Canada | 49.76s | QB | 6 | 15.Leo Nolles | Uruguay | 50.79s | QB | 7 | 17.Nikoli Blackman | Trinidad Tobago | 51.01s | QB | 2 | 19.Joaquín Vargas | Peru | 51.72s | | 8 | 21.Jayhan Odlum-Smith | Saint Lucia | 52.01s | | 1 |
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Heat 2 | | time | | L | 2. Guilherme Caribé | Brazil | 48.63s | QA | 4 | 8. Javier Acevedo | Canada | 49.26s | QA | 5 | 9. Alberto Mestre | Venezuela | 49.28s | QA | 3 | 10.Guido Buscaglia | Argentina | 49.65s | QB | 6 | 16.Lamar Taylor | Bahamas | 50.95s | WD | 2 | 18.Isaac Beitia | Panama | 51.32s | | 1 | 23.James Allison | Cayman Islands | 52.05s | | 7 | 27.Sidrell Williams | Jamaica | 52.74s | | 8 |
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