Oakland Raiders defensive end Khalil Mack (52) on the field during the first half of a NFL game against the Kansas City Chiefs in Kansas City, Mo., Sunday, Dec. 10, 2017. Heidi Fang Las Vegas Revi …

Oakland Raiders defensive end Khalil Mack (52) on the field during the first half of a NFL game against the Kansas City Chiefs in Kansas City, Mo., Sunday, Dec. 10, 2017. Heidi Fang Las Vegas Review-Journal @HeidiFang