Patrick Mahomes passed for 320 yards and three touchdowns and the Kansas City Chiefs clinched homefield advantage throughout the AFC playoffs with a 29-10 victory over the host Pittsburgh Steelers on Wednesday.Travis Kelce became the third tight end in NFL history to reach 1,000 career receptions and also took over the franchise lead with his 77th career touchdown catch. Xavier Worthy and Justin Watson also caught scoring passes and Kareem Hunt rushed for a touchdown for the Chiefs (15-1) during the Christmas Day affair.Russell Wilson completed 23 of 37 passes for 205 yards and one interception as Pittsburgh (10-6) failed to clinch the AFC North for the second straight game. The Steelers have lost three consecutive games.Mahomes was 29-of-38 passing while helping the Chiefs win their sixth straight game. Kansas City also set a franchise record with its 15th victory.Kelce had eight catches for 84 yards to raise his career receptions total to 1,004. Pro Football Hall of Famer Tony Gonzalez (1,325) and Jason Witten (1,228) are the only two tight ends with more catches.Ironically, it was Gonzalez’s franchise record for receiving scores that Kelce broke. He celebrated by doing Gonzalez’s signature dunking of the football through the uprights. Gonzalez was a college basketball player in addition to being a star football player.The Chiefs racked up five sacks and thrived defensively without star tackle Chris Jones (calf).Kansas City led by six at halftime and increased the lead to 16-7 on Harrison Butker’s 32-yard field goal with 12:21 left in the third quarter.The Steelers responded with Chris Boswell’s 36-yard field goal to move back within six with 5:45 left in the quarter.