Most wins in a season: 34 in 1910
Most losses in a season: 24 in 1910
The Kankakee Kays, a minor league baseball team, played in the Northern Association between 1910 and 1910.
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.