Not just based on the pot, teams are seeing he has "commitment" issues already.

Duh

His athletic upside will keep him in the first round, but he's not helping himself. He was frequently hurt in college. He seemed to disappear in Albert Haynesworth fashion for long periods last year and hasn't even been paid yet.

Adds to prior concerns.

RG has demonstrated he's a loose cannon and unreliable.

Because anyone who understands the consequences of failing a drug test and his earning potential, but does it anyway demonstrates poor judgement.

Teams don't want to take chances like they used to. This will cost him big money.