PITTSBURGH (AP) — Andy Reid donned a Santa Claus suit in a giddy Kansas City Chiefs locker room on Christmas Day, then handed his team a present it increasingly looks like it deserves: home-field advantage throughout the AFC playoffs.How Reid managed to slide into the costume so quickly after Kansas City's clinical 29-10 victory over the reeling Pittsburgh Steelers to lock up the top seed in the AFC for the fourth time in seven years is a mystery (though he hinted there's an elf involved).How Reid's team manages to pull away from the pack year after year is not.A lot of Patrick Mahomes. A dash of Travis Kelce. A splash of speed. A defense that quietly goes about its business, even when its leader is standing on the sideline in sweatpants.Yes, it has been ugly — by Kansas City's lofty standards — at times while the Chiefs have chased a third straight championship. Yet as the playoffs loom, the group that looked so vulnerable for most of the season suddenly seems to be rounding into form.And the road to the Super…

Patrick Mahomes passed for 320 yards and three touchdowns and the Kansas City Chiefs locked up the top seed in the AFC for the fourth time in seven seasons with a 29-10 win over the Pittsburgh Steelers.