FILE - In this Dec. 29, 2019, file photo, Pittsburgh Steelers head coach Mike Tomlin speaks to reporters after an NFL football game against the Baltimore Ravens in Baltimore. While Steelers head coach Mike Tomlin is encouraged by the fact no players have opted out of the 2020 season, he's also wary the season will be able to go without interruption amid the COVID-19 pandemic. (AP Photo/Nick Wass, File)