1989 Seattle Mariners ticket stub Dave Parker 300th HR SHARE ON: russ — February 2, 2020 Tags: 198980'sAug 6BaseballDave ParkerkingdomeMLBOakland AthleticsSeattle MarinersSeattle WA 1989 Seattle Mariners ticket stub Dave Parker 300th HR Winning bid: $22.50 Oakland Athletics at Seattle Mariners Box Score, August 5, 1989 Click to view more Kingdome ticket stubs