The Patriots would like to re-sign their 1,000-yard rusher at the right price, but it also may not happen until after he tests the market. I hear there is at least one team extremely hot on him (besides the Patriots) and that may up his price. It's too early to tell whether he'll hit free agency, but I bet this one goes right down to the wire.
The infamous mystery team. The most logical guess is that this is the Kansas City Chiefs. We've talked about Green-Ellis in the past and he makes sense for the Chiefs in a number of ways but the biggest thing is that he has 24 rushing touchdowns in the last two seasons. He knows how to get the ball into the end zone, which is a dynamic the Chiefs didn't really have last season and it cost them, especially in the red zone. Green-Ellis to the Chiefs is one of those moves that make too much sense.
An interesting factor in all this, potentially at least, is something I heard from Greg Bedard of the Boston Globe the other day when he was on 610 Sports. He says there's some sort of code between the Belichick/Parcells group, and especially Pioli and Belichick, where you don't pursue each other's free agents. Like they don't want to burn the other person in free agency. I'm not sure of the nuances involved in that but it's something to consider when determining whether the Chiefs will pursue Green-Ellis. Here's the audio of that segment on 610 Sports.