What specifically? There are definitely things broken like Tony Gwynn having better than 99 speed but showing less.
I've seen the CPU outfielder glitch 15 yards to be able to make a catch
Veteran mode is easier than rookie (not much difference between rookie and all-star) I'm bad so I like veteran because it goes faster rather than waiting for an extra 50 pitches a game.
I have hit a perfect perfect that could barely make it out of the infield
Refusing to let human win...6 diving catches in the outfield, 3 incredible grabs by a pitcher, making me miss a routine pop fly...having my base runner glitch in the middle of the bases all in 6 innings.