The Colts have played 47 playoff games in franchise history, including 5 games apiece against the Steelers, Chiefs, and Patriots. But until today, the Colts have never played the Bills in a playoff game, one of just two AFC teams (Jacksonville) that the Colts have never played in the postseason.

The Bills have played 31 playoff games, including against the Dolphins four times. Buffalo has played a postseason game against all but two AFC teams: the Colts and the Ravens.

For half of Buffalo’s history, the Colts were a division rival; but the two teams were rarely both good at the same time. The graph below shows each team’s winning percentage in each season since 1960.

In ’64 and ’65, the Bills won the AFL Championship both seasons, while the Colts were one one of the top NFL contenders. Of course, the two leagues wouldn’t first play until the following season. At least one of the teams — usually Buffalo — had a losing record for most of the next two decades. The Bills would have a decade long stretch under Jim Kelly when they were a perennial contender, while the Colts were having mostly down seasons.

In 1999, the Bills went 11-5 under Doug Flutie while the Colts and Peyton Manning went 13-3; both teams lost in notable fashion to the Titans in the playoffs. This year, those records are reversed, but along with ’64 and ’65, ’99 and ’20 are the only seasons in 60 years where both teams went 11-5 or better (or the same winning percentage in a non-16 game season). The Colts had a long run of success under Manning while the Bills were having down years.

But today, the longtime AFC East rivals will finally play in a playoff game.