It would be cute if it works out into a slick stack of necessary but not sufficient attributes that each roughly accounts for a single standard deviation jump. Pro athlete is probably like a +4 or +5 SD thing.
So it might go:
+1 SD for right age cohort
+1 SD for genetic endurance
+1 SD for genetic right size
+1 SD for sufficient practice
+1 SD for opportunity (great childhood coach, facilities whatnot)