I think his main problem is confidence, not unlike Rich Hill earlier this year. Guzman has nasty stuff. Let's hope he can put it together next season. Confidence is not a problem, throwing strikes is the problem; or rather not throwing them. Confidence is an outcome, not a cause. Guzman has struggled not becuase of what is between his ears, same with Hill. If you talk to any coach, they will tell you that a player's performance is directly impacted by how confident they are in what they are doing. Can confidence be impacted by good execution and good performance? Of course. But confidence can also be created, generated in a player's mind and it can enable a player to perform at their peak. Michael Jordan was a supremely confident performer at the end of a game. He wanted the ball. Yet he still had several failures at converting a game winning shot. The thing that he did was mentally relive the times when he was successful during the timeout before taking the court to hit the game winning shot. He believes, and I agree with him, that he was more successful because of his mental preparation. I agree that Guzman's struggles are probably mostly due to the fact that it takes an extended period of pitching without interruption to have the control necessary to succeed at the higher levels and he hasn't had that because of recent injuries. But the same is not true for Hill. Hill has had extended periods of healthy and success and the higher levels. But he wasn't performing well at the major league level. The mere fact that he went from sucking to performing at a Cy Young level is evidence that his problem was mental in origin. According to everyone who has first hand knowledge of Hill success, the origin of his major league struggles was completely mental. His lack of confidence in the majors affected his ability to execute pitches. He simply had to give himself the freedom to be himself and do what he was doing with such regularity at the AAA level. His extended period of success there made it easy for his muscles to remember what they were doing at Iowa and do the same thing with Chicago. It also made it easier for Rich to generate the confidence necessary to go from a terrible first outing in July against the Cardinals to a great one his next time out. And any coach that said that would be full of rah, rah, BS.