The longest active coach-team partnership in the NFL has come to an end.

Pittsburgh Steelers coach Mike Tomlin is stepping down after a two-decades long partnership that netted the franchise two Super Bowl appearances and one championship.

Tomlin never finished with a losing record in his 19 seasons with the Steelers. His 193 regular season wins are tied for ninth all-time in NFL history with fellow Steelers head coach Chuck Noll. His final game with the Steelers came in the most lopsided game of the wild-card playoffs, a 30-6 drubbing to the Houston Texans.

Tomlin, 53, was one of the youngest coaches in league history when he joined the Steelers back in 2007. It's reasonable to believe this is not the end for his coaching career in the NFL.

This grows the number of teams looking for a head coach to nine: Atlanta, Arizona, Baltimore, Cleveland, Las Vegas, Miami, Pittsburgh, Tennessee and the New York Giants. A quarter of the league is looking for a new leader next season.