Pubs, we've covered this several times now, including by sitemail.
The NL St Lousi Franchise (which is today's Cardinals) played in Sportsmans Park
The AL St Louis Franchise (the Browns...which in 1954 move to Baltimore and become the Orioles) also played in SPortsmans Park
The NL Philadelphia Franchise (which is today's Phillies) played in Shibe Park
The AL Philadelphia Franchise (the A's, which in 1955 moved to Kansas City and in 1967 moved again to Oakland) also played in Shibe.
Please see these links, which have the full standings for 1950. Click on any of the team names and you can see the franchise history, including when they moved and who they are today:
www.baseball-reference.com/leagues/AL/1950.shtml
www.baseball-reference.com/leagues/NL/1950.shtml