Disillusioned with the way Snyder was running the organization, Shanahan cleaned out his office in advance of January's wild-card playoff game against the Seattle Seahawks and expected to leave the team whenever the season ended, according to a source who spoke on the condition of anonymity.The source said Shanahan had grown tired of the way Snyder empowered Griffin and openly esteemed him above all other players. Shanahan didn't blame Griffin but did blame Snyder for creating an atmosphere that Shanahan did not believe was conducive to winning.
http://espn.go.com/nfl/story/_/id/10101919/mike-shanahan-was-ready-quit-washington-redskins-2012-seasonBut when Griffin injured his knee in that playoff loss, a source said, Shanahan changed his plans. He believed leaving at that point was no longer an option. He didn't want the general public, or possibly even his players, to think he left because of Griffin's injury.