One.
There are seven officials, but only one is called the referee.
The others is the umpire, line judge, back judge, side judge, head linesman, and field judge.
Just got back from Arlington and all I can say is I'm gutted. Well played Green Bay but I've got to say Pittsburgh threw that game away. I can't remember the last time Big Ben was that bad, he kept under throwing Wallace, one of which led to the pick six.
I'm off to cry myself to sleep and dream about someone beating Aaron Rodgers with his bloody championship belt.