Athletic Park's playing field was very small with distances estimated at between  to  to the left and right field foul poles. This meant home runs were common in an era otherwise not known for them. Perry Werden's 42 home runs in 1894 and 45 home runs in 1895 were several times higher than contemporary American Association or National League players and would not be challenged until Babe Ruth's rise in the 1920s.
Athletic Park's playing field was remarkably compact, spanning only about to the left and right foul poles. This led to a high frequency of home runs during an era that was not typically marked by them. Notable players like Perry Werden achieved impressive numbers in 1894 and 1895, with 42 and 45 home runs, respectively.