US version of the game, to use the DLC code you need to have a US account.
Instructions for creating a US account: https://www.gameexpres.cz/manualy/PSN_US_ucet.txt

Be a coach and team owner in the biggest American Baseball League MLB. This coach simulator allows you to create your own team, change and buy players, as well as create a strategy for the match. The game tries to create the most realistic experience so that you can fully enjoy the MLB. The matches are graphically created in TV style with the possibility of changing the strategy during the match. Experienced professionals will advise you during the campaign and give you interesting information that even the biggest fans of this sport do not know.

Of course, there is also support for online play. Trade, buy players from online players, or just compete in a cup match.