Sony San Diego is currently
livestreaming MLB 15 The Show on Twitch.TV. The developers will be playing a tournament all day long, so you will get plenty of gameplay and more details about the game.
Make sure you
check it out here or click the spoiler button below, to view the embedded stream.
For those of you that miss out, this post will get updated with the archive.
UPDATE: The livestream has completed.
Here is a link to the archive, it starts at roughly the 2:11 mark.