As his team’s frantic last play from scrimmage was unfolding against the Kansas City Chiefs on Friday, Raiders coach Antonio Pierce was under the impression officials had called the play dead.

There was a penalty called on that play—an illegal shift violation on Las Vegas that was declined by Chiefs coach Andy Reid. The whistle that Pierce claims the Raiders' sideline heard would've stopped the play and given the ball back to Las Vegas after a five-yard false start penalty.