MLB 14: The Show released on PS3 and Vita today but the wait will continue one week until new rosters are provided. For the time being the rosters included in the game do not represent any transactions that took place after mid-February. Unfortunately that means consumers may feel the need to wait until April 8 before starting up Franchise, Road to the Show, or Season mode.
The first roster update will include signings, player movement, and injuries that have occurred since mid-February along with accurate lineups and rotations to the start of the season. It should also include players who make their debut in the league prior to then. Remember no player can be included in a video game until they have officially appeared in an MLB game which makes them part of the MLBPA.