The two seasons under the leadership of managers Steve Swisher, Orlando Gomez, and Mike Hargrove, were largely unsuccessful, with the team finishing in seventh (1987) and sixth place (1988) in an eight-team league.

Future major leaguers Jeff Shaw, Tom Lampkin, and Bernardo Brito were part of the teams during the two years that the Williamsport Bills were affiliated with the Cleveland Indians.

Dave Bresnahan was catching for the Bills, who were in seventh place in an eight-team league, playing the last-place Reading Phillies in late-August game.

Former major leaguers who played for the Bills during the Mariners years included Tino Martinez, Rich DeLucia and Mike Gardiner.

Former Penn State Nittany Lion running back D. J. Dozier played outfield during his off-season from the NFL's Minnesota Vikings.