Apparently when you get popped for weed it's no longer on a first offense. In fact, he evidently failed multiple tests for weed.
Marijuana threshold: The NFL is ramping down it's stance on marijuana use. The threshold for a positive test has been increased from 15 ng/ml to 35 ng/ml.
Marijuana discipline: The punishment for a positive test is also changing. As is the case now, a first-time offense lands the player in the substance abuse program without a suspension. The primary difference is the punishment for a second positive test: simply a two-game fine. Each additional violation receives the following progressive discipline: four-game fine, four-game suspension, 10-game suspension. A player can therefore test positive for marijuana three times without getting suspended.