Roberto is suffering from "burn out". He burnt out all his weed.

Of course, the way to be successful in any form of entertainment is to be able to relate to a wider population and subjecting yourself to all sorts of states in order to understand different perspectives.

In sports, everything, including natural disease (Lou Gehrig), synthetic enhancers (steroids), money problems, legal troubles, injuries, etc., have been a downfall but I have never heard about a Pothead. It blew my mind that Ricky Williams took a year off from playing a game that he loves just because he wishes he played football thirty years ago, before drug testing.