Most wins in a season: 72 in 1921
Most losses in a season: 64 in 1921
The Rockford Bells, a minor league baseball team, played in the Illinois-Iowa-Indiana League between 1921 and 1921.
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.