Via the Washington Post:
The Washington Redskins plan to start Kirk Cousins at quarterback Sunday at Atlanta, a move that would lead to them sitting down Robert Griffin III with three games left in his second NFL season, several people familiar with the situation said Wednesday.
It is expected that Griffin will be deactivated for the remainder of the season, according to two people with knowledge of Coach Mike Shanahan’s thinking, and that Rex Grossman will take over as the second-string quarterback.
Shanahan said Monday that if he did choose to replace Griffin with Cousins, Griffin would not play for the rest of the season.
The Redskins made no formal announcement, though Shanahan was scheduled to address the media later in the day Wednesday. Griffin also was scheduled to hold his weekly news conference.