Improve on what you have to work with show your desire to love the game. My son (MI) was "average" in high school, 5'10 - 5'11 and 170's. He knew that hard work, effort, and understanding the game better than others would hopefully give him an edge. Beginning of Sr. year only 2 D1 schools were willing to take a chance on him. He accepted one and for the 3 years he did well. He did manage to grow to 6' and fill out a little 190's. Was drafted in 1st round, minors for a couple of years and now MLB. Even now sports writers ask him about his size and success, which he still admits to them he doesn't pass the eye test that fans envision a professional athlete to be. He's not quite as small as Madrigal but as RJM has said "Control what you can, don't waste time on what you can't control. With hard work, talent, and being in the right place at the right time (luck) hopefully your son will fulfill his dream.