Raiders former head coach Dennis Allen, left, and defensive coordinator Jason Tarver, right, watch from the sideline during the fourth quarter of an NFL preseason game against the Dallas Cowboys in Oakland, Calif., Friday, Aug. 9, 2013.
Raiders former head coach Dennis Allen, left, and defensive coordinator Jason Tarver, right, watch from the sideline during the fourth quarter of an NFL preseason game against the Dallas Cowboys in Oakland, Calif., Friday, Aug. 9, 2013. Ben Margot AP
Raiders former head coach Dennis Allen, left, and defensive coordinator Jason Tarver, right, watch from the sideline during the fourth quarter of an NFL preseason game against the Dallas Cowboys in Oakland, Calif., Friday, Aug. 9, 2013. Ben Margot AP