| POS | Rank | Heat | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|
| 1 | 1 | 2 | Joshua Mance |
USA |
45.59 |
| 2 | 2 | 2 | Kévin BORLÉE |
BEL |
45.71 |
| 3 | 3 | 2 | Jeremy Wariner |
USA |
45.72 |
| 4 | 4 | 2 | Tony MCQUAY |
USA |
45.95 |
| 5 | 5 | 2 | Michael Bingham |
GBR |
46.19 |
| 6 | 6 | 2 | Riker Hylton |
JAM |
46.25 |
| 7 | 1 | 1 | Mario Forsythe |
JAM |
46.65 |
| 8 | 2 | 1 | DeWayne Barrett |
JAM |
46.85 |
| 9 | 3 | 1 | Allodin Fothergill |
JAM |
47.01 |
| 10 | 4 | 1 | Nicholas Maitland |
JAM |
47.05 |
| 11 | 5 | 1 | Renny QUOW |
TTO |
47.06 |
| 12 | 6 | 1 | Tabarie Henry |
ISV |
47.48 |
| 1 | Ricardo Chambers |
JAM |
DNS | ||
| 2 | Yannick Fonsat |
FRA |
DNS |