All Things NFL Droughts, Streaks & Other Stats on Instagram: "No franchise has more playoff appearances than the Pittsburgh Steelers since the 1970 NFL Season (merger). The Steelers had only been one-and-done in the postseason 6 times (27%) when Mike Tomlin took over as head coach in 2006. Today the Steelers have been one-and-done in the postseason since 1970, now 14 times which is one behind the Vikings 15 who lead all of the NFL. Tomlin has now taken the one-and-done rate to 41% of their appea