Last start, Romero looked really good for the first 3 innings and he looked confident and happy. After he walked the first batter in the 4th, you could tell something changed, the confidence he garnered throughout the first 3 innings disappeared. While this may be a mechanical issue, unable to throw the pitch over the plate, I have that feeling that he just is not mentally stable, he doesn't believe in himself and has no confidence in his abilities.