| Final 20:30 | time | | L | React. | bib | | 1. Pavel Maslák |  CZE | 45.24s | NR | 5 | 0.179 | 156 | | 2. Chris Brown |  BAH | 45.58s | PB | 6 | 0.244 | 112 | | 3. Kyle Clemons |  USA | 45.74s | | 4 | 0.189 | 390 | | 4. David Verburg | USA | 46.21s | | 1 | 0.218 | 413 | | 5. Lalonde Gordon |  TRI | 46.39s | | 2 | 0.230 | 370 | | 6. Nery Brenes |  CRC | 47.32s | | 3 | 0.158 | 149 |
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| Qualification Standard A: 45.10s | | Qualification Standard B: 46.80s |
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| | - Friday 07.03 - First 3 progress to Final. |
| Semi 1 21:15 | time | | L | React | bib | | 1. Pavel Maslák | CZE | 45.79s | | 3 | 0.156 | 156 | | 2. Kyle Clemons | USA | 46.06s | | 5 | 0.200 | 390 | | 3. Lalonde Gordon | TRI | 46.29s | | 6 | 0.187 | 370 | | 4. Nigel Levine |  GBR | 46.84s | | 1 | 0.165 | 199 | | 5. Marek Niit |  EST | 47.67s | | 2 | 0.199 | 178 | | -. Edino Steele |  JAM | DQ R163.3(b) | 4 | 0.189 | 248 |
| Semi 2 21:22 | time | | L | React | bib | | 1. Chris Brown | BAH | 46.19s | | 5 | 0.220 | 112 | | 2. Nery Brenes | CRC | 46.25s | SB | 4 | 0.187 | 149 | | 3. David Verburg | USA | 46.33s | | 3 | 0.191 | 413 | | 4. Luguelín Santos |  DOM | 46.37s | | 6 | 0.176 | 165 | | 5. Rafal Omelko |  POL | 46.94s | | 2 | 0.217 | 314 | | 6. Akheem Gauntlett | JAM | 47.13s | | 1 | 0.178 | 247 |
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| | | Friday 09.03 - First 2 + Best 2 progress to Semi-Finals. |
| Heat 1 10:40 | time | | L | React | bib | | 1. Lalonde Gordon | TRI | 46.07s | | 5 | 0.153 | 370 | | 2. Edino Steele | JAM | 46.38s | | 4 | 0.171 | 248 | | 3. Marek Niit | EST | 46.52s | | 6 | 0.204 | 178 | | 4. Vitaliy Butrym |  UKR | 46.98s | | 3 | 0.199 | 377 | | 5. Erison Hurtault |  DMA | 47.25s | | 2 | 0.171 | 163 |
| Heat 2 10:47 | time | | L | React | bib | | 1. David Verburg | USA | 46.62s | | 5 | 0.288 | 413 | | 2. Rafal Omelko | POL | 46.84s | | 3 | 0.204 | 314 | | 3. Jarrin Solomon | TRI | 46.86s | | 4 | 0.219 | 371 | | 4. Gustavo Cuesta | DOM | 47.43s | | 6 | 0.253 | 164 | | 5. Nika Kartavtsevi |  GEO | 48.68s | SB | 2 | 0.299 | 211 |
| Heat 3 10:54 | time | | L | React | bib | | 1. Luguelín Santos | DOM | 46.54s | | 5 | 0.180 | 165 | | 2. Nery Brenes | CRC | 46.62s | | 4 | 0.161 | 149 | | 3. Nigel Levine | GBR | 46.64s | | 6 | 0.177 | 199 | | 4. Anderson Henriques |  BRA | 46.82s | PB | 1 | 0.153 | 125 | | 5. Donald Sanford |  ISR | 47.90s | | 3 | 0.281 | 239 | | -. Siologa Viliamu Sepa |  SAM | DQ R163.3(a) | 2 | 0.193 | 354 |
| Heat 4 11:01 | time | | L | React | bib | | 1. Kyle Clemons | USA | 46.42s | | 6 | 0.213 | 390 | | 2. Akheem Gauntlett | JAM | 46.85s | | 4 | 0.180 | 247 | | 3. Tabarie Henry |  ISV | 46.87s | | 2 | 0.175 | 240 | | 4. Bram Peters |  NED | 47.50s | | 3 | 0.220 | 287 | | -. Richard Buck | GBR | DQ R163.2 | 5 | 0.162 | 191 |
| Heat 5 11:08 | time | | L | React | bib | | 1. Chris Brown | BAH | 45.84s | SB | 6 | 0.229 | 112 | | 2. Pavel Maslák | CZE | 46.01s | | 5 | 0.199 | 156 | | 3. Nick Ekelund-Arenander |  DEN | 46.68s | | 4 | 0.197 | 160 | | 4. Mark Ujakpor |  ESP | 47.16s | | 3 | 0.210 | 172 | | 5. Falcon Fagundez |  URU | 49.89s | PB | 2 | 0.222 | 385 | | 6. Jannot Bacar |  COM | 50.11s | | 1 | 0.293 | 148 |
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