Most wins in a season: in 1888
Most losses in a season: in 1888
The Haverstraw, an independent, minor league baseball team, played in the Hudson River League between 1888 and 1888.
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.