So the coaches legitimately only let him throw two pitches in the game? If so, that sounds pretty dumb. How can it be so difficult to throw a third pitch when you throw the other two so well?
You look at his good numbers in a tough pitching league in a small sample size and you see promise. I guess if he truly can never learn a third pitch, he will never be a big league starter. I just don't see how that's possible to not be able to throw a third pitch when you can already throw two plus ones.