The last time I played a baseball video game was probably Baseball for the NES.
My free rental for the month of January is MLB 2K6. It has shown me just how much more complex Baseball has gotten over the years. Just the hitting mechanic alone has taken years off of my life.
All of these simulation calibre sports games are starting to make me less ambivalent and more upset about sports games.

UPDATE 1/10: I fired up 2K6 this morning and the first hit from the Cooperstown All-Stars was a would-be home run into left field. My uber-mensch in deep left field ran up that wall and snatched that fly. With it came a 150-point achievement. That, true believers, was the last achievement and the last play of MLB 2K6.