2012 World Junior Championships in Athletics – Men's 4 × 100 metres relay
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. Records. , the existing world junior and championship records were as follows. Results. Heats. Qualification: First 2 of each heat (Q) plus the 2 fastest times (q) qualified Participation. According to an unofficial count, 93 athletes from 22 countries participated in the event.