#10 is here.
#9 September 30, 1962 162
The greatest team in San Francisco Giants history was dead in the water on September 22 - 4 games behind the Dodgers with 8 to play.
8 days later - the Giants came into the final day of the season a game out, needing a win+ a Dodger loss to force a playoff.
The Giants were tied with Houston 1-1 in the 8th (after leaving the bases loaded in the 7th) when Willie Mays homered to give what would be the final margin of victory, 2-1.
The Dodgers lost.
3 days later, the Giants won their first San Francisco pennant.