Khalil Mack shows Cardinals he's going to be a force in 2015

Daily Raiders blog for NBC Bay Area website: Raiders linebacker Khalil Mack was a constant problem for the Arizona Cardinals in a Sunday night exhibition game, coming up with two sacks, a forced fumble and three tackles, an indication he's already primed for Game 1 of the regular season. http://www.nbcbayarea.com/news/sports/Raiders-Mack-Attack-is-Already-Rolling-323388781.html