Jon Robinson has just posted an article on the My Player and Franchise Mode improvements for MLB 2K11.
"Another change is the fact that when you pause the game, it doesn't show you a pitcher's energy or stamina meter. Now, everything is tracked using actual pitch count data. So if Tim Lincecum is on the mound, there will be a box that tells you how the manager wants to keep him in the 80-110 pitch count range for the game. Keep him in too long throughout the season, and you're going to wear him down. Take him out too early too often, and you'll wear out your bullpen."