St. Louis needs a quarterback.
In an uncapped year, prior to a CBA renegotiation which will almost certainly produce a rookie slotting system for contracts, no GM wants to be on the hook for doling out the last of the ginormous rookie deals. Hence, teams in the top 10 or so in the draft will be scrambling to trade down. especially since there's really no elite offensive talent in this year's draft.
Even in a good year, GMs hate giving the really big money to defensive players. Cf Jimmy Kennedy, among others.
The undisputed best player in this year's draft is a defensive lineman, Ndamukong Suh.
Which means a GM with high draft pick - like, say the Rams' GM, is going to be doubly unwilling to pay top dollar for Mr. Suh as the top draft pick.
The Eagles have a surfeit of quarterbacks and cash to burn. And they have a desperate need on the defensive line.
It may not happen. But someone's probably going to at least sniff around it.