RG3 is a 'healthy' scratch, and Kirk Cousins will start for the Redskins
Earlier in the season, when he was obviously not 100% healthy and unable to move as well as he normally does, they played him anyway, and paid for it with 3 key losses to open the season.
Now, when he's healthy at the end of the season, they're benching him in favor of backup Kirk Cousins. The reasoning is that they want to ensure that he remains healthy for the offseason, now that the 3-10 Redskins are completely out of playoff contention.
If they had benched RG3 in the beginning of the year when they should have, they might not be in this predicament. They might have been able to piece together a couple more wins at the beginning of the season, RG3 may have been more effective in the middle of the season by coming back when he should, and he might have potentially been leading them to a playoff spot now, instead of riding the pine.
I said about a year ago that the Redskins should have considered trading RG3 when they might have had the chance. That was before they allowed him to wreck his knee in the playoffs in another game he should never have played.
Griffin is an incredibly dynamic player, but he obviously still hasn't learned when to hold 'em and when to fold 'em. He makes great plays with his feet, but needs to know that sometimes, it's ok to slide and go down, and it's also ok to run out of bounds at times.
The Redskins are mismanaging this situation horribly, and this latest decision to start Cousins is just another confirmation that they've botched the handling of their franchise QB.