Good article on ESPN regarding Mat Latos' maturation from HS to his rookie year to today. Shows you a lot of what it takes to succeed isn't just in your arm, legs, etc.
Funny excerpt from that same article, but shows you where his head was in HS.
http://sports.espn.go.com/mlb/news/story?id=5460639Or better yet, maybe it was the game against Douglas in Latos' senior year when he threw at the opposing team's third base coach. During the game, Latos believed the coach had been stealing Placencia's signs and had been calling them out to Douglas' batters. After one sequence when Latos believed he heard the coach tell one of his players that a changeup was coming, Latos stepped off the mound and hurled a ball that pegged the coach in the chest.
Latos sneered at the coach and said, "This is what is going to happen if you keep doing it."