I think it has a lot to do with the fact that both teams are in really good cap shape, and they have some similar needs and both want the best players.
There are interesting things going on in Phildelphia, in case you haven't noticed. Last night I posted that it looks like Bentley is going to sign with Phildelphia after Childress wanted him for the Vikings. Now there's talk about the Eagles also going after Hutchinson from Seattle. Childress also was interested in him.
Looks like any moves the Vikings want to make in free agency are also being looked at by the Eagles. I wonder if there is some "tit for tat" going on between Childress and Reid?
I find it strange that the only teams being mentioned for Bentley and Hutchinson are coaches (or ex coaches) from the same team. Maybe it just shows that both coaches believe that a good team starts with an offensive line and then they plug in a running back lastly.
Until Childress gets the Vikings O line set, I don't think the Vikings will be getting a top FA running back.