Oakland Raiders head coach Jon Gruden, left, and general manager Reggie McKenzie before an NFL preseason football game against the Detroit Lions in Oakland, Calif., Friday, Aug. 10, 2018. (AP Phot …

Oakland Raiders head coach Jon Gruden, left, and general manager Reggie McKenzie before an NFL preseason football game against the Detroit Lions in Oakland, Calif., Friday, Aug. 10, 2018. (AP Photo/John Hefti)