Thanksgiving games date back to 1800s, Sports
Why do the Cowboys play on Thanksgiving? Explaining Dallas' tradition
Ravens Rewind: Thanksgiving History - PressBox
Thanksgiving and the NFL: The most embarrassing Turkey Day moments in football history – New York Daily News
The Detroit Lions' First Thanksgiving Day Game at Briggs Stadium - Vintage Detroit Collection
The AFL's Thanksgiving Day Games – Tales from the AFL
Thanksgiving and Football Made for Each Other
NFL Thanksgiving: Detroit Lions and Dallas Cowboys uphold league's yearly tradition on US holiday, NFL News
Why the Cowboys and Lions always play on Thanksgiving Day, NFL teams' records on the holiday
What Was Eaten at the First Thanksgiving?