Was about to post a thread about this, this morning. I don't know why he is consistently overlooked. The guy is tough, works hard, and has an eye for the net. IMO I'de have him on the wings before your generic soft grinder (eaves, glendenning, emmerton, etc) any day. He has adapted his game for the wings, and has more dimension on a fourth line than any of the previously mentioned guys! Sheahan and Ferraro have under achieved compared to what many expected out of them, when they were drafted, Cally has done nothing but work his ass off and improve every year. He's not an enforcer by any means, but isn't afraid of anyone, and can also put the puck in the net. He deserves a shot.
also, although +/- can be deceptive, Mitch is a plus 13.