| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 343 | Bershawn Jackson |
USA
|
46.13 Q | 0.153 |
| 2 | 194 | David Gillick |
IRL
|
46.15 Q | 0.167 |
| 3 | 76 | Williams Collazo |
CUB
|
46.34 Q PB | 0.258 |
| 4 | 212 | Edino Steele |
JAM
|
46.84 | 0.178 |
| 5 | 17 | Michael Mathieu |
BAH
|
47.09 | 0.192 |
| 278 | Denis Alekseyev |
RUS
|
DQ | 0.298 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 16 | Chris Brown |
BAH
|
46.64 Q | 0.180 |
| 2 | 363 | Jamaal Torrance |
USA
|
46.69 Q | 0.176 |
| 3 | 72 | Nery Brenes |
CRC
|
46.73 Q SB | 0.227 |
| 4 | 280 | Dmitry Buryak |
RUS
|
46.95 | 0.205 |
| 5 | 148 | Richard Buck |
GBR
|
47.70 | 0.207 |
| 6 | 208 | Ricardo Chambers |
JAM
|
48.02 | 0.181 |