The Kansas City Chiefs hung on to defeat the Baltimore Ravens in a Week 1 thriller, but a historic moment also occurred for the franchise's record books. Chiefs quarterback Patrick Mahomes notably passed Len Dawson's franchise-leading 28,

The Chiefs have expanded their lead and quarterback Patrick Mahomes has a franchise record. On Kansas City’s latest possession, Mahomes passed Hall of Famer Len Dawson for the most passing yards in franchise history. Dawson’s previous mark was 28,507. So far on Thursday, Mahomes is 9-of-13 for 117 yards — giving him 28,541 and counting.