Balls and Strikes

John Roberts closing statement was simple, concise and to the point. I think that is a notable point, especially when you consider that he listened to 3 hours and 17 minutes of speaking from the Senators. One line struck me though.

Paraphrasing:
"I will remember that I am the charged with calling the balls and strikes, not with pitching or hitting"

To continue the metaphor... If the Supreme Court calls the balls and strikes, then who is in charge of banning steroids?