Most wins in a season: 19 in 1976
Most losses in a season: 28 in 1976
The Guaymas Ostioneros, a minor league baseball team, played in the Mexican Pacific League between 1976 and 1976.
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.