What two NFL teams always play a Thanksgiving Day game, even if they're terrible that year?

The Lions have been a Thanksgiving Day mainstay on the gridiron since 1934; it all started as a marketing ploy to get Detroit more interested in their middling NFL team. The Dallas Cowboys pulled a similar marketing maneuver in 1966 and have played all but two Thanksgivings ever since.

Asked by Beth Sederstrom · Last updated 5 years ago · 8.5K views · SOURCE