I remember reading he was going to play 5 American hardcourt tournaments. If that's still true (and he starts in Washington):
Pilot Pen (it replaced my TD Waterhouse Cup in Long Island, New York where I saw Richie last year
We know the two Masters and the Open are a sure thing so its the other two tournament that we are left to speculate about. It could be the Mercedes Benz Cup in LA since that starts one week after DC. (That would only give him a week rest after DC). At least we can eliminate the RCA Championships since that starts the Monday after DC.
So for the other two tournaments we have either the Mercedes Benz Cup (LA),Legg Mason (Washington), or the Pliot Pen(Connecticut).
I think I may of just overthought the entire thing.