Updated: 4:23 PM CST Dec 27, 2020 KMBC 9 News Staff Kansas City clinched the top seed in the AFC and the only playoff bye when Patrick Mahomes threw a 25-yard touchdown pass to Demarcus Robinson with just under two minutes for a 17-14 win over Atlanta on Sunday.The Chiefs had to watch as Pro Bowl kicker Younghoe Koo missed a tying field-goal attempt with 9 seconds left to escape. The Chiefs (14-1) won their NFL-record seventh straight one-possession game and matched a franchise record with their 10th straight win. They took any seeding drama out of games involving Pittsburgh and Buffalo and will have that coveted first-round AFC bye when the postseason begins in two weeks.The Falcons (4-11) took the lead when Matt Ryan hit Laquon Treadwell for a 5-yard touchdown with 4:33 to go. But Mahomes kept finding Travis Kelce - who had a record-setting game of his own - to set up the TD pass to Robinson. And when the Falcons marched the other way in the closing seconds