Late 1960s Three Rivers (stadium) proposal that would have been built on a bridge over the Monongahela. #Pirates pic.twitter.com/FJgSlE1SPX— MLB Cathedrals (@MLBcathedrals) April 28, 2018
Late 1960s Three Rivers (stadium) proposal that would have been built on a bridge over the Monongahela. #Pirates pic.twitter.com/FJgSlE1SPX