The former tackle for the Alabama Crimson Tide didn't exactly have a good showing at the 2009 NFL Combine, which is the source of the hilarious picture occupying the better part of your screen.
The best part is that Smith initially announced that he wasn't going to workout at the NFL combine, saying that he wasn't in the shape he wanted to be in. When he did participate, he weighed in at 332 pounds and could do only 19 reps of 225 pounds on the bench.
He was eventually drafted sixth overall by the Bengals in the 2009 NFL draft, and would go on to miss all of his first training camp.
Ultimately, can't you just picture R. Lee Ermey from Full Metal Jacket yelling at this guy and calling him a "fatbody"?
And that's why Smith is tops on this list. The other 19 guys may have been out of shape, but they didn't do it as big as Smith.