How will professional sports should regulate excessive PED abuse? And how will it influence the athletes?

Lance Armstrong (photo taken by New York Times)

-The economic principle I will explore is Institutions, “rules of the game” that influence choices.

-The overall question I will research to help explore the economic principle is how will professional sports regulate performing enhancing drugs and how will it influence its players/athletes?

3-4 subquestions that will help me answer my overall research question are:
-How will the NFL regulate its players using PED's? ESPN
-How will the MLB regulate its players using PED's? Seton Hall Law
-How will the Tour De France regulate its players using PED's? Taylor & Francis
-How will regulating PED's affect the athletes? U of I News Bureau