Khalil Mack aims to win rookie of the year, put Peyton on his back

Raiders linebacker Khalil Mack has two things on his mind this season: Winning the defensive rookie of the year award, and sacking Broncos quarterback Peyton Manning. Mack told the Raiders’ website that earning the rookie of the year award is his top goal for 2014. “I want to prove that they got a top guy,”…