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Through the 2008 season, that was 1999 when they won the American League West Division. They lost to the Yankees in the ALDS, 3 games to 0.
7 years
The Phoenix Cardinals never made it to the playoffs in the 6 years they were around.
The Cowboys have appeared in the playoffs 30 times between 1966 and 2009.
the Patriots
1998
2
The Cowboys have missed the playoffs for three straight years - 2010-12. The Patriots last missed the playoffs in 2008.
50000000 years
1996-97 N.Y. Rangers 1995-96 N.Y. Rangers Luc Robitaille
The Cowboys were defeated by the Minnesota Vikings in the second round of the 2009-2010 playoffs, 34-3.