Now to come back on topic, I play softball and basketball. Cycling helps both of those aerobically, but it's not much help physically for my legs because it uses muscles differently. It probably helps the legs overall to some degree.
Cycling does nothing to help my upper body at all for my other sports.
Fun-wise, if I ever had to choose between cycling and ball sports, cycling would lose every time . . . at least, heavens forbid, until I was too old for ball sports.
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See, this is why we can't have nice things. - - smarkinson
Where else but the internet can a bunch of cyclists go and be the tough guy? - - jdon