The Time The Cowboys DIDN'T Host Thanksgiving

In 1975 and 1977, the St. Louis Cardinals took over hosting duties for the Thanksgiving game over the Dallas Cowboys. This decision did not go so well. Here's the story behind how the Cardinals, for two years, got to play on Thanksgiving and kick the Cowboys off.
How Monday Night Football Almost Never Happened: • The Creation of Monday...
NOTE: One part had to be removed due to copyright (around the 1:20 mark). It talked about how nobody wanted to play on Thanksgiving outside of the Lions, and that Pete Rozelle was looking to push the envelope on television