How do you bring up players in spring training in mlb2k12?

To bring up players in MLB 2K12 during spring training, navigate to the "Roster Management" section in the main menu. From there, select "Call Up/Send Down" options to promote players from your minor league affiliates to the major league roster. Ensure you manage your roster to have the right number of players, adhering to the game’s roster limits. After making your selections, confirm the changes to finalize the roster adjustments.