Interesting. Even football has smaller players. D backs, running backs and even some safety's and wide receivers are actually not that tall (I know tall is relative). O line you need mountain men. There is a sweet spot for hitters in baseball. Too tall or too short and you have something to prove. Gymnastics, the smaller the better. What every sport requires at the highest level is fast twitch, coordination, a crap ton of grit and staying healthy.