Control the things you can control and the rest will take care of itself. If you're 5'9 then be the best 5'9 pitcher you can be. Maybe that's enough and you will get a shot. Maybe somebody can help you get better and will give you a chance to improve. Maybe you're just not good enough and it's not really the fact you're short but you just don't have it. I'm with Coach May in that talent will prevail but I also agree with hokieone in that the taller players will stand out (no pun intended) better than shorter players. In either case you don't have control over any of this. So just control the things you can control.
People need to remember that you're not dealing with idiots or guys that don't know what they are doing. These are college coaches or pro scouts - they know if you're 5'9 or 6'1. You don't know if the "embellishment" will hurt you or not because you don't know the coach. It probably won't IF you can play but why take the chance?
In the overall process of determining if someone is good enough for a spot on a team the height and weight are very low on the list of things that are important. Probably 1A and 1B would be talent and grades and those are both things you can control. You can make yourself the best player you can be and you can get good grades. Once you do those two things then the rest is out of your hands.
Relax and enjoy the game.