The last two months has provided such a steady diet of rumors that Oregon's Chip Kelly will be bolting to the NFL that the rumors have now become a common, rock-solid belief.
Fueling those rumors is the possible sanctions the Ducks might be facing once the NCAA concludes its investigation. Many feel Kelly will pull a Pete Carroll and and jump ship once the sanctions hit. One report claims the NCAA has been conducting six hour interviews with those in the recruiting services in recent months, and that the NCAA will be handing down sanctions after the bowl season. (This report is very dubious, however. Terms such as "recent months" and "sources with knowledge of the situation" are always red flags).
Chip Kelly and his agent claim they haven't any contact with NFL execs, but I'm not so sure I believe them. Whether Kelly wants to go to the NFL or not, he would at the very least listen to offers just to gauge what is available. But if Kelly does go to the NFL, I don't think it will have anything to do with sanctions pushing him in that direction. He's always been upwardly mobile and truly believes his system would be equally successful in the NFL.
As for the sanctions coming down the pipe? What we know is that Oregon violated reporting rules in regard to its use of recruiting services. That violation doesn't even approach the seriousness of what happened at Ohio State and Miami. But if the NCAA finds that some of the money paid to recruiters made its way to the players or their families, then the Ducks should see some heavy sanctions. But so far, nothing of that nature has publicly surfaced.