The problem with Dennis isn't conditioning, or peaking, as everyone thinks (although he was obv. way off target at the CO.).
The problem is his symmetry, and abdomen. The larger he got, the more spread out his abs got and consequently, the higher his lats look. In addition, his quads are far too small around the knee, and lack depth and muscularity.
Lastly, his muscle insertions are broad and his joints are fairly big, so his muscle doesn't pop or hang off the bone.
No question he's a freak with amazing size, but there's just nothing he can do to compete with bigger, better structured athletes.