Finley and Roller Derby boss Jerry Seltzer had both put in a bid on the team .
Prior to the 1970 -- 71 season , Charles O. Finley , the flamboyant owner of baseball 's Oakland Athletics , purchased the Seals .
owner and Roller Derby boss Jerry Seltzer had both put in a bid on the team .
Prior to the 1970 -- 71 season , Charles O. Finley , the flamboyant owner of baseball 's Oakland Athletics , purchased the Seals .