 Patrick Mahomes and the Kansas City Chiefs are aiming to become the first team to three-peat since the 1965-67 Green Bay Packers won three consecutive NFL championships. Eight teams have new head coaches. While 20 teams begin camp this week for rookies, most veterans don't report until next week. Only the Ravens, Chiefs, Bears, and Houston Texans will have their full teams in camp this week. The defending AFC South champion Texans are first to open their doors to veterans this