The 2020 Major League Baseball season was the San Francisco Giants' 138th year in MLB, their 63rd year in San Francisco since their move from New York following the 1957 season, and their 21st at Oracle Park.

On March 12, 2020, MLB announced that because of the ongoing COVID-19 pandemic, the start of the regular season would be delayed by at least two weeks in addition to the remainder of spring training being cancelled.

[1] Four days later, it was announced that the start of the season would be pushed back indefinitely due to the recommendation made by the CDC to restrict events of more than 50 people for eight weeks.

The Brewers had the tiebreaker edge with their record against division opponents (19–21) better than the Giants' (18–22).

Source: MLB Standings Grid – 2020 Infielders Outfielders Other batters Coaches Note: G = Games played; AB = At bats; R = Runs; H = Hits; 2B = Doubles; 3B = Triples; HR = Home runs; RBI = Runs batted in; SB = Stolen bases; BB = Walks; AVG = Batting average; SLG = Slugging average Source:[1] Note: W = Wins; L = Losses; ERA = Earned run average; G = Games pitched; GS = Games started; SV = Saves; IP = Innings pitched; H = Hits allowed; R = Runs allowed; ER = Earned runs allowed; BB = Walks allowed; SO = Strikeouts Source:[2]