ST. JOSEPH, Mo. (AP) – Chiefs general manager Scott Pioli believes significant progress has been made during the first two weeks of a most unusual training camp.  Speaking after Kansas City’s walkthrough Wednesday morning, Pioli says he’s been “encouraged” by several new players and the ground that’s been covered by Todd Haley and the rest of the coaching staff after the lockout.  The defending AFC West champs wrap up their first leg of training camp with a practice under the lights Wednesday night in St. Joseph, Mo. They head home to Arrowhead Stadium for their preseason opener Friday night against the Tampa Bay Buccaneers.