Yes, Farmer was on the sidelines, you see him walk by as the camera is showing Washington on the bench after getting hurt. There's not much emotion to read from his brief cameo. Farmer came out after a penalty at 4:20 left in game, it was the 7th play of that series. Farmer returned on the following series at 2:20.
Without looking at all the game, he may have played 83 downs prior to coming out. It's hard for me to think its anything more than he was being rested.