One of the few doctors who performs this procedure was just on WFAN with Joe & Evan. He said HGH is used in some of these surgeries, but not in Colon's case. The risk is minimal, recovery time quick and he can't see why MLB(or any sports league) would be against it as long as no HGH is involved. According to him, this new 'regenerative science' will revolutionize sports medicine. He's right. Athletes will flock to this. There's no cheating - you're using your own body to heal.