FYI NFL.com says he faces a 2 week suspension and 4 weeks salary fine, all due with effect from 14th October, but if he appeals, the ban would start 18th (curious how they say even after appeal he starts the ban - worded as if there's no chance of the appeal working!).
Personally, considering what he did, I thik he got off lightly. It should be a 4-6 week ban at least. And why should the authorities bow to him serving in the off season? How many convicted criminals get to chose when they start their sentence?