Corvo is Trade Bait?

Hi gang. Slowly working my way back into the season flow. And now I've seen something potentially weighty piqued my interest. TFP and one other media outlet I saw promoted the idea that Joe Corvo is being shopped by the Canes. What am I missing here? This was a guy JR coveted long-time. Now he's expendable? What's changed? Has been out boozing and feeling up female pub patrons? Is the club so desperate with the injuries up front that they'd dump Joe for somebody like Peter Schaefer who can't even hold a spot on the Bruins roster? How can you be desperate when you are 2-1 with two in-conference victories under your belt? Somebody splain me this one.