Major League Baseball 2K9 includes excellent features that defined the series, but it also has a fresh set of improvements to make it even better than before.
The game will automatically update with real-time baseball news. Say one of your favorite players, like Matt Holliday, packs up and heads to a new team. His virtual self will then follow suit. If it happens in real-life (sans steroids, obviously), it'll happen in the game.