Most wins in a season: 23 in 1908
Most losses in a season: 10 in 1908
The Washington, an independent, minor league baseball team, played in the Union League between 1908 and 1908.
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.