Mark is also a pretty boy (no homo) which certainly doesn't hurt his game any. Dude looks great, I have a serious time believing he uses steroids. If so, he clearly isn't doing what the pros are doing like OneMoreRep mentioned.
Steroids don't alter the shape of your muscles, the insertion points etc. He has nice lines, which you get from mom and dad, not from a bottle of testosterone. Maybe he uses or has used, maybe not, but i certainly believe he could easily be natural.
Ya'll white people are occasionally allowed to have good genetics also...
