birdboy2000
Banned
Unless this somehow butterflies the rest of the civil rights' movement, the Civil Rights Act of 1964 would force integration, so that's the latest possible date. More likely it happens sometime during the 1950s, as the whole edifice of legal discrimination tumbles down -pro sports want big audiences, and even white northerners (and MLB is a northeastern/midwestern business at this time) are no longer nearly as tolerant as segregation as they had been.
Having major league baseball integrated in the late 1950s, around the time of OTL sit-ins, would have significant knock-on effects to the game's detriment, largely because the other pro sports were already integrated and it doesn't need this stigma. Consider the reputation the Red Sox under Yawkey developed OTL with regard to race relations and apply it to the whole league. (That said, if the PCL doesn't go along, or the Negro Leagues get real investors and start poaching white talent, you might see a significantly more crowded baseball landscape.)
Having major league baseball integrated in the late 1950s, around the time of OTL sit-ins, would have significant knock-on effects to the game's detriment, largely because the other pro sports were already integrated and it doesn't need this stigma. Consider the reputation the Red Sox under Yawkey developed OTL with regard to race relations and apply it to the whole league. (That said, if the PCL doesn't go along, or the Negro Leagues get real investors and start poaching white talent, you might see a significantly more crowded baseball landscape.)