 The ballpark was also called Union Park or Union Association Grounds (not to be confused with the later and better known Union Park).On July 4, 1884, Baltimore played a split double header against the Cincinnati Outlaw Reds and the run-away league leaders, the St. Louis Maroons, which saw a sellout crowd in attendance.The field also hosted a home game (a makeup of an earlier postponement) for the traveling Chicago Browns on September 17, who played against the Maroons while in the midst of a road series against Baltimore.