The NFL has been playing Thanksgiving Day games since the twenties. Contrary to popular belief the Cowboys were started as an expansion team in 1960.
The Lions have had the game since 1934 (exept the years 1939-1944), and the Cowboys have hosted a game each year since 1966(excluding 1975 and 1977 when the St. Louis Cardinals hosted the game).
the Canton Bulldogs
Princeton and Yale played in that first game.
Because when the pilgrims first arrived at the shores of New England the realized there was no football team so they created the Patriots and football is played on thanksgiving ever since then and we continue to celebrate this tradition.
Titans vs Lians
the colts and broncos. tim tebow won