all teams made the playoffs once
The Knicks made the playoffs the last two years (2011, 2012).
The last time that two teams from the AL Central both made the playoffs was 2006, where the Minnesota Twins won the division and the Detroit Tigers took the Wild Card.
It was back in 1996.
Houston Texans has never made the NFL Playoffs.
The Nationals have not made it to the playoffs in their current city.
The last time the Toronto Maple Leafs made the playoffs was in 2004
Over the last twenty years, the Yankees made the playoffs 17 times.1995-2007, 2009-2012
The Yankees made the playoffs a total of 14 times over the last 16 years, which excludes 1994 and 2008.