Most wins in a season: 12 in 1988
Most losses in a season: 47 in 1988
The Red Sox-Mariners, a minor league baseball team, played in the Arizona League between 1988 and 1988.
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.