if it matters at all i heard on the news last night that the failed test wasnt for weed like the previous 3 were.
What was this failure for, is it known yet? I personally don't think the NFL should mommy it's players around off the field, but as long as they have the rules he should stick to them if he wants to play.
As far as addiction goes, weed technically isn't physically addictive. Developing a tolerance is hit or miss and there's no clearly defined withdrawal syndrome aside from grouchiness. It can be very habbit forming because of its high level of social reinforcement, which can be just as powerful as an actual physical addiction, perhaps more so and especially in people with preexisting mental problems, disorders, etc.
This guy either has major issues or just can't figure out what he wants in life. He obviously wants the millions, but wants the money on his own terms. Apparently at the very least he hasn't grown up enough to know you can't get everything on your own terms. Stupid prick in my opinion. Overall I'd say if he can do drugs and play successfully the NFL should back off monitoring his off field choices. But as long as they've got the rules, he should either obey them or quietly deal with the consequences when he gets caught.