The men's 4 × 100 metres relay at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 13 and 14 July. [1] [2] [3]
The men's 4 × 100 metres relay at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 13 and 14 July. [1] [2] [3]
Prior to the competition [update] , the existing world junior and championship records were as follows.
| World Junior Record & Championship Record |  United States (Trell Kimmons, Abidemi Omole, Ivory Williams, LaShawn Merritt) | 38.66 | Grosseto, Italy | 18 July 2004 |
| World Junior Leading |  Japan (Kazuma Oseto, Akiyuki Hashimoto, Tatsuro Suwa, Kazuki Kanamori) | 39.16 | Fukuroi, Japan | 3 May 2012 |
| Broken records during the 2012 World Junior Championships in Athletics | ||||
|---|---|---|---|---|
| World Junior Leading | United States (Tyreek Hill, Aldrich Bailey, Arthur Delaney, Aaron Ernest) | 38.67 | Barcelona, Spain | 14 July 2012 |
Qualification: First 2 of each heat (Q) plus the 2 fastest times (q) qualified
| Rank | Lane | Nation | Athletes | Time | Notes |
|---|---|---|---|---|---|
 | 6 | United States | Tyreek Hill, Aldrich Bailey, Arthur Delaney, Aaron Ernest | 38.67 | WJL |
 | 5 |  Jamaica | Tyquendo Tracey, Odean Skeen, Jevaughn Minzie, Jazeel Murphy | 38.97 | NJ |
 | 4 | Japan | Kazuma Oseto, Akiyuki Hashimoto, Aska Cambridge, Kazuki Kanamori | 39.02 | |
| 4 | 2 |  Poland | Kamil Bijowski, Przemysław Słowikowski, Karol Zalewski, Adam Jabłoński | 39.47 | |
| 5 | 3 |  Australia | Ben Jaworski, Hugh Donovan, Nicholas Hough, Matthew Bertacco | 39.59 | |
| 6 | 8 |  Bahamas | Blake Bartlett, Teray Smith, Shane Jones, Stephen Newbold | 39.74 | |
| 7 | 9 |  Brazil | Leandro de Araújo, Yuri Monteiro, Renato dos Santos Junior, Rodrigo Rocha | 39.75 | |
| 7 |  Great Britain | Emmanuel Stephens, Chijindu Ujah, David Bolarinwa, Adam Gemili | DNF |
According to an unofficial count, 93 athletes from 22 countries participated in the event.
Australia (4) Bahamas (5)
Bahrain (4) Brazil (4)
Canada (4)
Czech Republic (4)
Denmark (4)
Finland (4)
France (4)
Germany (4)
Italy (4) Jamaica (5) Japan (4)
Nigeria (4) Poland (4)
South Africa (4)
Spain (4)
Switzerland (4)
Thailand (4)
Trinidad and Tobago (4) United Kingdom (5) United States (6)
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