On cnn.com there's an article on how to build a natural body without illegal substances and they had this guys photo.
Not commenting on this guy specifically, but physiques like that can be attained naturally. Even for the guy in the pic, he looks like an athlete, maybe a cornerback or some pro athlete... and remember, BEING FIT AND IN SHAPE IS THEIR JOB... THEY GET MILLIONS $$$ FOR THEIR ATHLETIC SCALE... trust me, you give anymore a million $ they'll get their ass on the treadmill as if it was a 9-5 job... so for a professional athelete its easily acheived... again, think of it as a 9-5 job... if he does 3-4 hours of cardio, tons of protein for even 2-3 weeks, he'll be in that condition...
and he's not BIG by any means, so no suspicion of substances.... but for the average joe which has a 9-5 job to be in that condition, one might suspect illeagal substances...