Does Manny Ramirez Smoke Pot?

I guess the person who wrote his authorized biography sure thinks so (from the AP via the LA Times):

At Fenway Park, where Ramirez played through his prime and became Boston's first World Series MVP, the writer of his authorized biography said her first suspicion was that the drug was marijuana.

I would think the person who wrote Manny's authorized biography would know about these things. Right? So not only was Manny is a dope and was caught doping, but he also seems to smoke dope as well?