KANSAS CITY, Mo. (AP) — The Chiefs have won just about every way imaginable during a perfect 15-game run that dates to last season: Patrick Mahomes leading last-second touchdown drives, their defense making a stand, and Harrison Butker kicking game-winning field goals. They added a walk-off block to the list against the Broncos on Sunday. Leo Chenal was part of a red wave that crashed through the center of the Denver field goal unit, and the Chiefs linebacker got his hand on Wil Lutz’s 35-yard attempt as time expired, allowing Kansas City to escape with a 16-14 victory. “It’s a complete shock,…