“He got in bad habits,” said Cooper. “He was collapsing more than he should. When you collapse, you get under pitches, around pitches. [Stuff] can get flat. Some parts of the plate can be much harder to attain.
“Another thing he did really well is he’s bought into, ‘Let’s see how good I can be throwing first-pitch strikes and getting them to hit the first, second or third pitch, and if not, get ahead in the count.’ His strike-to-ball ratio was excellent. The credit goes all to him, because he’s the guy throwing every pitch. But it’s awfully nice when it works out.”
Jackson threw 69 of 95 pitches for strikes over seven-plus innings in winning his White Sox debut Wednesday night against the Tigers. He credited Cooper with getting him to stand taller in his delivery, which in turn helped with his control.