| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 868 | Kerron Clement |  USA | 48.51 CR | 0.241 | 
| 2 | 884 | Brandon Johnson |  USA | 48.62 PB | 0.161 | 
| 3 | 496 | Ibrahim Al-Hamaidi |  KSA | 48.94 AJR | 0.191 | 
| 4 | 696 | L.J. van Zyl |  RSA | 49.06 SB | 0.168 | 
| 5 | 168 | Yasser Lismet |  CUB | 50.24 | 0.158 | 
| 6 | 686 | Wouter le Roux |  RSA | 51.17 | 0.152 | 
| 7 | 278 | Richard Davenport |  GBR | 51.59 | 0.159 | 
| 8 | 93 | Diego Venâncio |  BRA | 52.07 | 0.180 |