What percentage of baseball players make it to the majors?

I do not believe the 10% answer is correct. There are 286 Div I Schools, 236 Div II Schools, and 362 Div III schools. Assuming ALL of these have Baseball teams and assuming all of the teams have 35 players on their rosters, there are over 30,000 NCAA baseball players in any given year. There are 30 MLB teams which have 25 players each, or 750 MLB player. (The teams can expand to 40 at the end of each season if desired, so there may be as many as 1,000 MLB players.) 30,000 divided by 750 would yield 40:1 odds of being drafted if EVERY team in MLB started over and had NOTHING BUT ROOKIES. A preposterous proposition at best! Therefore, the highest mathematical possibility would be 2.5%. Let's assume that each MLB team drafts 10 rookies a year. 30,000 divided by 300 would equal 1%. Still not a realistic number.