Meriweather is a safety who was originally picked up by the New England Patriots in the first round of the 2007 NFL draft. He spent his first four seasons in New England before the Patriots cut him prior to the 2011 season. He played for the Chicago Bears last season, appearing in 11 games.
The Redskins are likely losing S LaRon Landry in free agency, which opened a need at the position. Meriweather is probably a little overhyped as a player but a two-year, $6 million contract is a decent deal for both sides.