In the 1989 World Series , the Giants were swept by another San Francisco Bay Area team , the Oakland Athletics . The 1989 Series was infamous for the large earthquake that struck the San Francisco Bay Area , delaying Games 3 and 4 of the World Series by 10 days . In the 2002 World Series against the Anaheim Angels , the Giants led 3 games to 2 heading back to Anaheim for Games 6 and 7 , but the Giants lost the last two for the third World Series loss since moving to San Francisco . In Game 6 of that Series , the Giants held a commanding 5 – 0 lead heading into the 7th inning . However , the Giants allowed the Angels to score 6 unanswered runs in the 7th and 8th innings for one of the greatest comebacks in World Series history . The Giants lost Game 7 ( and the Series ) the next day 4 – 1
large earthquake
1989 Loma Prieta earthquake
Curse of Coogan's Bluff