Athletics at the 1979 Pan American Games – Men's 4 × 400 metres relay  The men's 4 × 400 metres relay competition of the athletics events at the 1979 Pan American Games took place on 13 and 14 July at the Estadio Sixto Escobar. The defending Pan American Games champion was the United States team. Prior to this competition, the existing world and Pan American Games records were as follows: