Possible, but not now. The sound files of the announcers and even the Justin Verlander at start-up aren't decoded/hacked yet. With the evolution of NBA2K, the game files of nba 2k are no longer similar to MLB2k, even the texture editor and the sound editor in the download section is borrowed from NBA2k, it is sad to say that the game is getting close to dead if we exclude roster/portrait/texture updates.
But instead of waiting someone to save us, we may just have to learn how to do those or buy a PS4 for the show