If you count ST specialist Trevor Davis as a WR, then I think the Packers got 8 WRs for what will be 6 or maybe 7 spots. So I'm not the least surprised they're open to trading someone... and Cobb would free up the most cap space and really hasn't lived up to that contract.
Though I'll always wonder, what if we cut Cobb and kept Nelson.
But I've gotten the feeling the Packers are open and listening for trade offers on all their contract year guys. Which includes
Matthews, Cobb, Wilkerson, Lewis, Clinton-Dix, Kenricks, Bell, House, Rollins, Monty, Ryan, Hundley (already traded), Ripkowski and Goodson (for UFA) ... and for RFA it's Allison, Brice, Hawkins, Evans, Kerridge and Mbu.
Probably not the one year contract guys like WIlkerson and Lewis, but I wanted to add them as being in contract years.