Most wins in a season: 72 in 1913
Most losses in a season: 78 in 1911
|1909||Boise Irrigators/Bozeman||Inter-Mountain League||16||41||Roster||Stats|
|1911||Boise Irrigators||Union Association||64||78||Roster||Stats|
|1912||Boise Irrigators||Western Tri-State League||56||46||Roster||Stats|
|1913||Boise Irrigators||Western Tri-State League||72||45||Roster||Stats|
|1914||Boise Irrigators||Union Association||32||39||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.