 This is only partly true; Dallas had in fact decided to host games on Thanksgiving by their own decision because there was nothing else to do or watch on that day.In 1975 and 1977, at the behest of then-Commissioner Pete Rozelle, the St. Louis Cardinals replaced Dallas as a host team (Dallas then hosted St. Louis in 1976).Although the Cardinals, at the time known as the "Cardiac Cards" due to their propensity for winning very close games, were a modest success at the time, they were nowhere near as popular nationwide as the Cowboys, who were regular Super Bowl contenders during this era.