Olympic champions Justin Gatlin and Elaine Thompson lead the U.S. and Jamaica at the IAAF World Relays in Nassau, Bahamas, live on NBC Sports Gold on Saturday and Sunday.
Gatlin and Thompson, as well as fellow Olympic champions LaShawn Merritt, Yohan Blake and Shaunae Miller, are ramping up their outdoor seasons ahead of the U.S. Championships in June and the world championships in August.
At the world relays, national teams compete in men’s and women’s 4x100m, 4x200m, 4x400m and 4x800m events and a mixed-gender 4x400m.