The men's 4 × 400 metres relay at the 2019 World Athletics Championships was held at the Khalifa International Stadium in Doha, Qatar, from 5 to 6 October 2019.

They led off with their bronze medalist Fred Kerley, but the early leader was Jamaica's Akeem Bloomfield, with Belgium's Jonathan Sacoor also in the mix.

Down the home stretch, Kerley pulled back ground as Bloomfield slowed, by the handoff, USA had a step on Jamaica.

Thomas set himself up to pounce coming off the turn, instead London slowly began widening the gap, getting the lead back to 4 metres before he named off to Norman's training partner, hurdler Rai Benjamin.

Colombia set a new national record again in the final, a second and a half improvement, going under 3 minutes for the first time and moving their country into #15 on the all-time list.