But, how do you prove these things? You are trying to psychoanalyze from a very far distance, and no real understanding of the situation. Burnett seems like a pretty stable guy to me - solid K rate, great stuff, groundball pitcher, etc. Give me things that actually win baseball games, and are proven to do so, over something that could possibly be completely untrue, like your perception of a player's "makeup". Stats are a guideline. It is hard if not impossible to measure a players mental toughness, his intangibles like leadership, etc. But just because you can't measure them doesn't mean that they aren't important or don't have any effect on the game.