Oakland Raiders head coach Jon Gruden walks the sideline during the first half of an NFL game a …

Oakland Raiders head coach Jon Gruden walks the sideline during the first half of an NFL game a ...

Oakland Raiders head coach Jon Gruden walks the sideline during the first half of an NFL game against the Los Angeles Chargers at Dignity Health Sports Park in Carson, Calif., Sunday, Dec. 22, 2019. (Heidi Fang /Las Vegas Review-Journal) @HeidiFang