Milwaukee County Stadium, where the Brewers played from 1970 through 2000. In March 1974, a friend and I snuck into the stadium, ran across home plate, stood on the pitcher's mound, walked around the infield, and also made our way onto the stadium roof.
In 1966, the Angels Landed in Anaheim's Futuristic Baseball Stadium
Unlike RFK where the the seating section is on a track that converts the stadium for football/soccer, the same was not true of Memorial Stadium. Description from forums.bigsoccer.com. I searched for this on bing.com/images