This by Melissa Isaacson at ESPN Chicago. I know many of you will say "I've heard this before..........". A couple of interesting points in the story. He's 15 lbs lighter. He has a greater sense of accountability. This was the first offseason he stayed in Chicago and subsequently realized that his 3 girls are growing up, and he needs to represent himself better during games especially when they are watching. He also is apparently moving away from the cutter and working more on his slider.
Apparently, Rothschild urged Z to lose weight in order to improve his delivery, potentially avoid minor injuries that put him on the DL, and improve his pitching stamina during games. Only time will tell, but this story, at worst, means nothing, and at best, means we may see an improved Big Z this year, which the team sorely needs.