Sony and San Diego Studio have stated that they are looking for players to give feedback on MLB The Show 20 via a closed beta. Sign-ups are open now and will stay open until January 2nd, and those who are successful will get a system message on the PS4. The beta will be running from January 14th until January 20th. For a chance to play the beta you need to head to TheShowNation.com/beta to sign up.
A couple of weeks ago Major League Baseball announced that even though there was still a partnership with Sony and San Diego Studio beyond 2021 the MLB games would feature on other platforms, with Switch and Xbox Series X being likely new homes alongside the Sony consoles like PS4 and PS5. Nintendo pretty much confirmed the franchise would appear on its consoles in the future.
MLB The Show 20 is expected to release on March 17th, 2020 for PS4.
Source: The Show Nation