Most wins in a season: 9 in 1878
Most losses in a season: 25 in 1878
The Springfield Springfields, a minor league baseball team, played in the International Association between 1878 and 1878.
Average attendance is based upon the number of actual home dates where known (most leagues from 1992 and later). Where the number of home dates is not known, the average is calculated using half the team's total games.