I don't know......if you encompass and combine ALL and every professional sport you could ever imagine......football, baseball, hockey, basketball, cricket, soccer, tennis, etc. it would probably add up to roughly about 1% of participants with the amount of people who play semi, intermural league, pop warner, little league, etc. and probably around a 0.01% success rate out of all of those sports and all of those people.
I'm not a numbers guy, but i do know the percentages of someone succeeding in pro sports is lowwwwwwww.