The major leagues have a way of exposing any weaknesses a player might have. A prospect may have flown through the minors hitting the fastball well, but struggled against breaking pitches. That might lead to good numbers in the minors, but there’s a good chance he won’t see many fastballs in the majors.
Starting pitchers with only two pitches can have success early on, but it will be hard to repeat that over a long period of time — especially trying to get the same hitters out multiple times in the same game.
There were few players to blow onto the scene the way that Luis Ortiz did this past season.