sorry but this doesn't fly. Greg did put on some muscle in his upper body through weight training, but muscle can also come off. According to KP he was weighing about 13 pounds heavier starting the season then when he posted amazing run/jump numbers at the predraft and 13 pounds is relatively nothing for a guy that size.... 1/20th of his total weight.
What he's had to play through this year is his legs not being in the same sort of shape that they were pre-MF. According to Greg and the Blazer Docs, his knee is structurally fine. With history as my guide on guys coming back from being down a year, it usually isn't until their 2nd season back that they regain their athleticism/bounce. Maybe this won't be the case for Greg, but you saying it definitely won't be is just your speculation.
STOMP