Sony's MLB: The Show 21 on Xbox Game Pass was an MLB decision
MLB The Show 21: Former PlayStation Exclusive Coming To Xbox Game Pass
MLB The Show 21 Review - The Mark Prior of Baseball Games
I noticed MLB the Show on Xbox is published by MLB itself. MLB does have a publishing arm called MLB Advanced Media and they publish(and produce) RBI Baseball, whose MS Store listing
MORE
MLB The Show 21 Available to Pre-Load for Xbox Game Pass Subscribers Now
MLB the Show 22 Has Several Fun but Familiar Ways to Play a Season
It Was MLB's Decision to Bring MLB The Show 21 to Xbox, PlayStation Says - IGN
MLB The Show 21 Players Can Play On The Field Of Dreams Tomorrow - Game Informer
Coming to Xbox Game Pass: MLB The Show 23 and Infinite Guitars : r/Games
Review MLB The Show 21 - XboxEra
It Was MLB's Decision to Bring MLB The Show 21 to Xbox, PlayStation Says - IGN
MLB The Show 22 Cover Athlete, Release Date, & Platforms Revealed
MLB The Show 21' Game Pass reactions reveal a big PlayStation problem