| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2016 | 
|---|---|---|---|---|---|
| 2 | 492 | Taha Hussein YASEEN |  IRQ | 47.14 | 47.14 | 
| 3 | 499 | Vladimir ACETI |  ITA | 47.13 | 47.13 | 
| 4 | 208 | Jamal Walton |  CAY | 45.99 | 46.08 | 
| 5 | 531 | Sean BAILEY |  JAM | 46.51 | 46.51 | 
| 6 | 173 | Karabo SIBANDA |  BOT | 45.40 | 45.40 | 
| 7 | 904 | Kahmari MONTGOMERY |  USA | 45.13 | 45.13 | 
| 8 | 570 | Naoki Kitadani |  JPN | 46.89 | 46.89 | 
| 9 | 236 | Anthony José ZAMBRANO |  COL | 46.03 | 46.03 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2016 | 
|---|---|---|---|---|---|
| 2 | 588 | Edwin Ngeeti |  KEN | 46.75 | 46.75 | 
| 3 | 658 | Jochem DOBBER |  NED | 46.67 | 46.67 | 
| 4 | 265 | Luis Charles |  DOM | 46.44 | 46.44 | 
| 5 | 571 | Kazuki Matsukiyo |  JPN | 46.74 | 46.74 | 
| 6 | 171 | Baboloki THEBE |  BOT | 44.22 | 44.22 | 
| 7 | 748 | Abdalelah Haroun |  QAT | 44.27 | 44.81 | 
| 8 | 191 | Musa ISAH |  BRN | 46.95 | 46.95 | 
| 9 | 654 | Iván Núñez |  MEX | 46.64 | 46.64 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2016 | 
|---|---|---|---|---|---|
| 2 | 715 | Tymoteusz ZIMNY |  POL | 47.14 | 47.14 | 
| 3 | 237 | David Å alamon |  CRO | 47.57 | 47.57 | 
| 4 | 193 | Myles Banfield |  CAN | 46.77 | 46.77 | 
| 5 | 589 | Geoffrey Kiprotich |  KEN | 46.23 | 46.23 | 
| 6 | 541 | Christopher TAYLOR |  JAM | 45.27 | 45.66 | 
| 7 | 899 | Wilbert LONDON |  USA | 45.28 | 45.28 | 
| 8 | 223 | Yu Ang WU |  CHN | 46.33 | 46.33 | 
| 9 | 365 | Cameron CHALMERS |  GBR | 46.87 | 46.87 |