Once upon a time, the Kansas City Chiefs, Buffalo Bills, Tampa Bay Buccaneers and San Francisco 49ers were not fixtures in the NFL playoffs.

Sure, it seems now like those four teams — with postseason streaks of nine, five, four and three years, respectively — start every season with a playoff berth clinched, but all great runs start somewhere.

The Chiefs made the playoffs just twice between 2007 and 2014, the Bills ended a 17-year playoff absence in 2017, the Buccaneers still are the losingest franchise in NFL history (.406 winning percentage) and the 49ers have had separate playoff droughts of five and eight years during this century alone.

Six teams — the Cleveland Browns, Detroit Lions, Green Bay Packers, Houston Texans, Los Angeles Rams and Pittsburgh Steelers — made the playoffs this season after missing out last season. It marks the 34th straight season — every year since the NFL expanded to a 12-team format in 1990 — with at least four playoff newcomers.