According to Jon Heyman of Sports Illustrated. Check out the tweet here: http://twitter.com/SI_JonHeyman. Story should be posted up on SI.com soon.
I'm sure he was just using it to recover from injury. Nothing to see here.
Does anyone suspect that the player he was traded for might have been using PEDs as well? His drop in power is really unexplainable. Guess I'll give him the benefit of the doubt. Just a thought.