With the switch to the 3-4 defense, the Redskins will require some players that have, you know, played in that defense before. For that, they've signed Vonnie Holliday, according to ESPN's Adam Schefter.
Holliday spent 2009 in Denver's 3-4 defense and the previous four years in Miami.
He'll play defensive end in Washington.
At age 34, he can't be considered more than a one-year stop-gap assuming he makes the team.