One of the guys I played football with in high school is an NFL defensive back...has been for the last several years. He says it's most...he can't say a certain percentage, just that it's most use AAS.
One of my closest friends, former pro baseball player for the Colorado Rockies, says that it's almost 100% in the minor leagues and while not 100% in the big show it's pretty close there too. He says now that the heat has been put on these guys they are having to find more ways to be creative with what they use.
These athletes will always use performance enhancing drugs, this is a fact. If it gets to a point where they absolutely cannot, it will destroy those sports...people won't watch. And I think the big names in Washington know this...their whole witch hunt in sports is more smoke and mirrors then anything else and they have no desire to see these sports crumble...they are big money making factors in the American life and anything that harms that is going to be against what anyone in D.C. wants.