Referees in the Chargers-Chiefs game missed a penalty that should have given Kansas City another chance at a game-winning field goal with eight seconds left.
If they had made it and won, the Pittsburgh Steelers would have made the playoffs. Instead, the Chiefs missed the kick, the penalty wasn't called, the game when to overtime San Diego ended up winning 27-24 and clinched the sixth seed.
According to NFL rules, the defense can't have more than six players on the line of scrimmage on either side of the snapper during a field goal attempt. It's a five-yard illegal formation penalty.
As you can see, San Diego had seven guys the to the snapper's left:
Fox
Here's the rule, which comes from Rule 9, Section 1, Article 3.b.1:
NFL
Ryan Succop, the Chiefs' kicker, would have had another try from 36 yards out. He's 15 for 16 from 39 yards or shorter this year.