 He had started working as an assistant coach for a high school football team when he signed with the Kansas City Chiefs on August 26, 2019, following an injury to backup quarterback Chad Henne.Moore took over as the Chiefs quarterback after Patrick Mahomes injured his knee on October 17, 2019, in a week 7 game on "Thursday Night Football" against the Denver Broncos.Moore finished the game against the Broncos going 10-of-19 for 117 yards and a touchdown pass.