1.Why does the controller shake so much in the later innings? Is it cause the players are tired? Or is it just to make it harder?
2.Why does the controller shake when you aim at certain pitch locations?
1. A combo of being tired or being in a pressure situation.
2. The idea is to make it harder to locate a pitch on the corner of the plate. I think with better command pitchers like Doc Halladay it doesn't shake as much but a guy like Jonathan Sanchez who walks tons of guys it will shake like crazy.