According to the Baltimore Ravens Blog
Three of the four teams on the Ravens’ preseason schedule – Philadelphia , Kansas City and Atlanta – made the playoffs in 2010, while the Redskins are entering their second season under Super Bowl-winning coach Mike Shanahan.
Baltimore Ravens 2011 Preseason Schedule
Week 1: Aug. 11-15 at Philadelphia Eagles
Week 2: Aug. 18-22 vs. Kansas City Chiefs
Week: 3: Aug. 25 vs. Washington Redskins (ESPN, 8 p.m.)
Week 4: Sept. 1 (likely) at Atlanta Falcons