36 years ago.
The last time was on September 12, 2010 at FedEx Field.
Not only have the Lions never defeated the Redskins at FedEx Field, they have never defeated the Redskins in Washington. Since the Redskins moved to Washington in 1937, they are 21-0 against the Lions at home.
They have never beat the Redskins in Washington.
2008
The Ravens beat ther Colts on December 2, 2001, by the score of 39-27.
October 10,2010
2012 pre- season da redskins won 7-6
In 2005.
That was on September 26, 2004 when the Colts defeated the Packers, 45-31.
the 2011 season
The Denver Broncos last defeated the Washington Redskins on October 27, 2013, in a game that ended with a score of 45-21 in favor of the Broncos. This matchup took place at Sports Authority Field at Mile High in Denver. Since then, the two teams have not met in the regular season.
Through the 2008 season, that was November 18, 2001 when the Redskins defeated the Broncos, 17-10, in Denver.