Got this from 2K today re: the MLB 2K8 patch:
We have been made aware of certain gameplay experience issues within Major League Baseball 2K8 that may effect the enjoyment for some players, and we are in the process of testing downloadable updates for both the Xbox 360 and PLAYSTATION 3 versions. Specifically, the Xbox 360 update will increase the frames per second to help improve the overall gameplay experience, while another update for both the Xbox 360 and PLAYSTATION 3 will correct an issue in Franchise mode when playing as the San Diego Padres and attempting to move players to and from their minor league roster. These updates are currently undergoing technical review, and will be available for download shortly, free of charge.
We are also aware of certain gameplay issues with the Wii and PlayStation2 versions of Major League Baseball 2K8. While there is currently not an update available for these platforms, as they do not yet have the network capability to issue updates, our team is working tirelessly to find other alternative solutions to provide an improved gameplay experience. We appreciate the feedback from all of our dedicated fans, and will continue to provide other updates and information when available.
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What that last bit means...I really have no idea.