There have been many pitchers who were considered "too small", who were told that they'd never make the majors because they were "too small", etc. Garbage, pure and simple. Many of them made the majors and were fine pitchers. Let me list a few of them for you: 1) Bobby Shantz, 5'6" if he was an inch, 139 lbs., who played for several teams including the Yankees and was one of the toughest pitchers in either league. 2) Ed Lopat, 5'10", 180-185 pounds, one of the greatest finesse pitchers in the history of the game and the one pitcher the Cleveland Indians feared more than any other because of what he used to do to them. 3) In a similar mold, Whitey Ford, 5'10" and 180 pounds, one of the greatest lefthanders of all time. 4) Harry Brecheen, 5'10", 165 lbs. You get the idea. So when you reach your full height you'll be 5'11"---not exactly a shrimp. Don't worry about it; just focus on making the most of what you have and can do. Good luck.