SAN DIEGO (AP) — The NFL says referees erred in not penalizing the San Diego Chargers for an illegal formation on a missed 41-yard field goal attempt by Ryan Succop of the Kansas City Chiefs with four seconds left in regulation on Sunday. Succop was wide right on the kick, and the Chargers went on to win 27-24 in overtime to claim the AFC’s final playoff spot.

The NFL says in a statement released Monday that had the penalty been assessed by referee Bill Leavy’s crew and the ball moved up 5 yards, it would have allowed the Chiefs to attempt a 36-yard field goal. San Diego lined up with seven men on one side of the snapper. The rule says no more than six players can be on the line of scrimmage on either side of the snapper.