| Final 20:31 | | time | | L | | 1. Lucas Conceição |  Brazil | 45.77s | | 5 | | 2. Luis Avilés |  Mexico | 45.97s | | 6 | | 3. Martín Kouyoumdjian |  Chile | 46.58s | | 3 | | 4. Lucas Carvalho | Brazil | 46.84s | | 7 | | 5. Jhon Perlaza |  Colombia | 47.32s | | 2 | | 6. Richard Kuykendoll |  United States | 48.66s | | 1 | | 7. Elian Larregina |  Argentina | 50.90s | | 4 | | -. Anthony Zambrano | Colombia | TR17.3.1 | DQ | 8 |
| 11 competitors from 9 nations. Venue: Julio Martínez National Stadium. |
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| World Record: Waide van Niekerk, South Africa 43.03s Rio de Janeiro, Brazil 14th August 2016 | | American Record: Michael Johnson, United States 43.18s Seville, Spain 26th August 1999 | | PanAmerican Games Record: Ronnie Ray, United States 44.45s Mexico City, Mexico 18th October 1975 |
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Heats - Monday, 30th October 18:10 | | First 3 from each Heat and Best 2 times advanced to Final. |
| Heat 1 | | time | | | Heat 2 | | time | | | 4. Lucas Carvalho | Brazil | 46.79s | Q | | 5. Elian Larregina | Argentina | 46.90s | Q | | 6. Martín Kouyoumdjian | Chile | 46.91s | Q | | 7. Jhon Perlaza | Colombia | 47.06s | q | | 9. Ezequiel Suárez |  Dominicana | 47.40s | | | 11.Nery Peñalosa |  Costa Rica | 50.97s | |
| 1. Lucas Conceição | Brazil | 45.76s | Q | | 2. Luis Avilés | Mexico | 45.84s | Q | | 3. Anthony Zambrano | Colombia | 46.01s | Q | | 8. Richard Kuykendoll | United States | 47.36s | q | | 10.Leonardo Castillo |  Puerto Rico | 48.23s | |
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Prepared and maintained by Todor Krastev
todor1966@yahoo.com
Last updated: 6 Nov 2023
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