It says it right here in this ESPN article
Pettitte was not linked to steroids in the report, and said he had never used them.
http://sports.espn.go.com/mlb/news/story?id=3156305
It sounds like you're implying there is no distinction between HGH and steroids.
It's just plain wrong to put growth hormone in the same category as anabolic steroids. In the sports version of the war on drugs, Bonds was shooting heroin while Hairston was smoking marijuana.
What's the difference between steroids and HGH? For starters, we know that a baseball player can beef up on steroids and improve his athletic performance. But most clinical studies suggest that HGH won't help an athlete at all. The other key difference is that while steroids cause a bevy of nasty side effects—testicular shrinkage, an increased risk of stroke—taking HGH doesn't seem to be that bad for you.
So far, no one has been able to connect the increase in lean body tissue caused by HGH with enhancement of athletic performance. Unlike steroids, growth hormone hasn't been shown to increase weight-lifting ability; in the lab, it has a greater effect on muscle definition than muscle strength. And it doesn't seem to help much with cardiovascular fitness, either.