I don't know if mental toughness is the correct term. Twelve YO DD pitches well in practice and in warm-up, but come gametime, she has trouble. I'm pretty sure she is "trying too hard" to pitch strikes, which slows down her body and completely messes with her form and as a result, her pitches. This is a recent development. Any tips to help her drown out the noise and disregard the pressure, so she can just do what she knows how to do?