My DD is a pitcher and I'm a counselor by trade. She has learned relaxation skills from a young age. They say she's hard to read on the mound. He best skill is deep breathing techniques, this produces pain killer chemicals in the brain. She also uses guided image or goes to her happy place in her mind. Sometimes she envisions the next pitch, as a strike of course. These have helped her in TB and HS, hopefully they will carry through in college next year. There is also counting, taking a time out like walking the circle (watch time) and holding hand up while batting