Most wins in a season: 40 in 1889
Most losses in a season: 52 in 1889
The New Haven/Hartford, an independent, minor league baseball team, played in the International Association, Southern New England League, Inter-State Association, Eastern League, Atlantic Association, Connecticut State League, Naugatuck Valley League and Eastern Association between 1878 and 1894.
|1878||New Haven/Hartford||International Association||1||11||Roster||Stats|
|1885||New Haven||Southern New England League||0||1||Roster||Stats|
|1887||New Haven||Eastern League||26||30||Roster||Stats|
|1889||New Haven||Atlantic Association||40||52||Roster||Stats|
|1894||New Haven||Connecticut State League||Roster||Stats|
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.