The U.S. Olympic Marathon Trials air live on NBC, NBCSports.com/live and the NBC Sports app on Saturday from Atlanta.
Coverage runs from 12-3 p.m. ET. The men start at 12:08, followed by the women at 12:20.
The top three finishers per gender are in line to make the Tokyo Olympic team.
Defending champion Galen Rupp looks to become the first person to win multiple U.S. Olympic Marathon Trials outright.
Rupp, a two-time Olympic medalist, is coming off Achilles and calf injuries that kept him from completing a marathon in 2019. But Rupp just recorded a promising half marathon, consolidating his favorite status.