Join Date: Mar 2008
Total Points: 1,084,797,448,719,003.88
I think that at a young age, being taller/bigger can give you the sort of advantage that allows you to win fights. This can make you lazy and less dedicated because you take things for granted.
Bigger guys also tend to be less slower and possibly have worse co-ordination, not moving their hands and feet as fast or as well as a smaller boxer would.
I don't think the big guys you mention are bad because of their size per se, more like a big unskilled fighter can beat a small unskilled fighter, but then when the big unskilled guy meets a legit, skilled opponent he gets destroyed because the skilled guy can negate size and the big guy then has nothing to fall back on.