Most wins in a season: 76 in 1887
Most losses in a season: 41 in 1887
The Oshkosh, a minor league baseball team, played in the Northwestern League between 1886 and 1887.
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.