There should be ratings for the regular tees for all the US courses. STA has a rating, too, from yellow I have 71.2 / 128, white 72.8 / 130, red (women) 75.7 / 143.
RSG may or may not have a US-style rating - the British Golfing Unions stick with their SSS-rating usually.
There will hardly be a rating for the black tees - pros don't get allowances.