Memorial Stadium was the home of the Baltimore Orioles from 1954-1991. It was also the home of the Baltimore Colts before they left and the CFL Baltimore Stallions. The AA Bowie Baysox played there for one year while their stadium was being built.
I went to the last two baseball games. The Orioles did a great job at the last one. They had dozens of players who came out onto the field and stood at the position they had played.
Here are videos on the history of the stadium and final Orioles game.