"On the play, San Diego lined up with seven men on one side of the snapper. This should have been penalized as an illegal formation by the defense.
"Rule 9, Section 1, Article 3(b)(1) of the NFL Rule Book (page 51) states that 'No more than six Team B players may be on the line of scrimmage on either side of the snapper at the snap.' The rule was adopted this year as a player safety measure.
"The penalty for illegal formation by the defense is a loss of five yards. This rule is not subject to instant replay review. Had the penalty been assessed, it would have resulted in a fourth-and-7 from the San Diego 18 with 0:04 remaining, enabling the Chiefs to attempt a 36-yard field goal."