Baltimore Ravens warm up during an NFL football training camp practice in an empty stadium, Saturday, Aug. 29, 2020, in Baltimore, Md.(AP Photo/Gail Burton)

Los Angeles Rams take the field in front of an empty stadium prior to a NFL football game against the Dallas Cowboys on opening night at SoFi Stadium in Inglewood on Sunday, September 13, 2020. (Keith Birmingham/The Orange County Register via AP)

Members of the Carolina Panthers stand during a special presentation in an empty stadium before an NFL football game against the Las Vegas Raiders Sunday, Sept. 13, 2020, in Charlotte, N.C. (AP Photo/Chris Carlson)

FILE - In this Saturday, July 4, 2020 file photo, empty stands are seen as Manchester United's Paul Pogba (6) shoots a free kick during their English Premier League soccer match against Bournemouth at Old Trafford stadium in Manchester, England. Much to the Premier League’s dismay, the new season will start on Saturday, Sept. 12 just as the last one finished only 48 days earlier — in empty stadiums. The world’s richest football league on Friday intensified its lobbying of the government to allow supporters back into games, even as England grapples with a sharp spike in coronavirus cases. (AP Photo/Dave Thompson, file)

The Denver Broncos and the Tennessee Titans take the field in an empty stadium prior to an NFL football game, Monday, Sept. 14, 2020, in Denver. (AP Photo/Jack Dempsey)