Getty Head coach Sean Payton of the Denver Broncos Coming out of their bye week and a dispiriting loss their archrival Buffalo Bills, the Kansas City Chiefs faced their most important game of the season on Sunday when they traveled to Denver to take on the AFC West-leading Broncos — and they lost. A walk-off, 35-yard field goal by nine-year veteran Denver kicker Wil Lutz sent the Chiefs back to Kansas City with a 22-19 defeat, dropping their record to 5-5 and leaving them needing a miracle if