| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2015 | 
|---|---|---|---|---|---|
| 2 | 189 | Chris Brown |  BAH | 44.40 | 44.54 | 
| 3 | 632 | Peter Matthews |  JAM | 44.69 | 44.69 | 
| 4 | 943 | Renny QUOW |  TTO | 44.53 | 44.54 | 
| 5 | 1067 | David Verburg |  USA | 44.41 | 44.41 | 
| 6 | 410 | LuguelÃn SANTOS |  DOM | 44.45 | 44.56 | 
| 7 | 580 | Kirani JAMES |  GRN | 43.74 | 43.95 | 
| 8 | 216 | Kévin BORLÉE |  BEL | 44.56 | 45.01 | 
| 9 | 1050 | Vernon NORWOOD |  USA | 44.44 | 44.44 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2015 | 
|---|---|---|---|---|---|
| 2 | 362 | Nery Brenes |  CRC | 44.65 | 44.80 | 
| 3 | 940 | Lalonde Gordon |  TTO | 44.52 | 44.64 | 
| 4 | 520 | Rabah YOUSIF |  GBR | 45.01 | 45.01 | 
| 5 | 631 | Rusheen MCDONALD |  JAM | 43.93 | 43.93 | 
| 6 | 194 | Steven GARDINER |  BAH | 44.27 | 44.27 | 
| 7 | 715 | Youssef Ahmed MASRAHI |  KSA | 43.93 | 43.93 | 
| 8 | 1049 | Bryshon Nellum |  USA | 44.65 | 44.65 | 
| 9 | 243 | Isaac MAKWALA |  BOT | 43.72 | 43.72 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2015 | 
|---|---|---|---|---|---|
| 2 | 759 | Liemarvin BONEVACIA |  NED | 44.72 | 44.72 | 
| 3 | 204 | Michael Mathieu |  BAH | 45.00 | 45.00 | 
| 4 | 627 | Javon FRANCIS |  JAM | 44.50 | 44.50 | 
| 5 | 938 | Machel CEDENIO |  TTO | 44.36 | 44.36 | 
| 6 | 1047 | LaShawn Merritt |  USA | 43.74 | 44.36 | 
| 7 | 857 | Wayde VAN NIEKERK |  RSA | 43.96 | 43.96 | 
| 8 | 521 | Martyn ROONEY |  GBR | 44.45 | 44.45 | 
| 9 | 217 | Jonathan BORLÉE |  BEL | 44.43 | 44.67 |