I remember a college football game in which Colorado scored on the last play to defeat Missouri. That last play was 5th down. Clearly a procedural mistake by the referee but it was not overturned and never litigated. I would be curious to know the outcome if it had been. I believe Colorado went on to win the national title that year. I also remember the perfect game that wasn't by Armando Galarraga. The last batter was ruled safe by the ump on a call that was clearly and unequivocally wrong. Should that have been litigated and the perfect game restored?