Usa Mixed 4×400 Relay. The usa mixed relay team of vernon norwood, shamier little, bryce deadmon and kaylyn brown set a new world record of 3:07.41 in the mixed relay over. Team usa set a world record in the newly contested mixed 4×400 meter relay at world championships, sending themselves into the finals of the event #nbcsports.

The usa 4×400 mixed relay team set a world record on the first day of track and field events in paris. With the rain starting to fall in stade de france, the united states mixed 4×400 relay team, which broke the world record on friday in the preliminary round.