Members of the Denver Broncos take part in drills during an NFL football practice in empty Empower Field at Mile High, Saturday, Aug. 29, 2020, in Denver. (AP Photo/David Zalubowski)

Lights adorn Allegiant Stadium, new home of the Las Vegas Raiders football team, as it nears completion Wednesday, July 22, 2020, in Las Vegas. The stadium will also serve as the home for the UNLV football team. (AP Photo/John Locher)