Isn't that a fairly old picture? If you want to see what kind of shape he's in, watch the Struve fight. It was only two weeks ago. I doubt his physique has changed much in that time.
this has probably already been posted but just in case there are some people that haven't: http://www.youtube.com/watch?v=sY2yYZG1ans
JDS looks amazing and lands bombs at will for 1.5 rounds then starts looking like ****. Hunt then bangs out the hopelessly gassed JDS in round 3. That's probably the most likely outcome imo.