The Lions likely are going to run by committee this season and use Jahvid Best in the Reggie Bush mode (some touches in between the tackles -- and he's busted a couple big runs during OTA; toss plays, screen passes and as a receiver).
Best has shown that when he gets in the open field, he's dangerous, and the Lions will try to get him in as many as those situations as they can.
This counters some other things we've been hearing about Best early this offseason, and how he would most likely emerge as the lead back. Most teams use a committee to some degree, but if Best is as talented and dynamic as he's being made out to be, it would be hard for the Lions not to use him as much as possible - unless they feel there are health risks.
Best is rated as the 30th best back at 4for4 with an ADP of the fifth round. He still has a chance to give you value this year, but monitor the situation leading up to your draft.