Most wins in a season: 28 in 1879
Most losses in a season: 22 in 1879
The Springfield, a minor league baseball team, played in the National Association between 1879 and 1879.
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.