It has become a strangely familiar sight: A player streaking toward the end zone, well beyond the reach of defenders, a touchdown looking like a certainty.
And then ...
Just before crossing the goal line, the ball carrier suffers a massive lapse in judgment and drops the ball, then sometimes tries to recover it as it bounces out of the back of the end zone. After a review, the apparent touchdown is overturned and changed to a touchback, giving the opposing team possession.
It has happened in each of the past two weeks, and the teams victimized by those gaffes will meet Sunday when the Indianapolis Colts host the Arizona Cardinals (1 p.