San Francisco Giants First-Place Elimination Scenario
San Francisco must win 27 more games (27 total) to avoid elimination from first place.
Here are the final standings in a scenario in which San Francisco finishes in first place with 27 wins:

Team             W	L	PCT	GB
San Francisco    27	135	0.167	0.00
Colorado         27	135	0.167	0.00
Arizona          26	136	0.160	1.00
Los Angeles      26	136	0.160	1.00
San Diego        25	137	0.154	2.00

Tie breakers
San Francisco wins the series with Colorado 12 games to 1

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Arizona          0	0	162	0.000	0.0
Colorado         0	0	162	0.000	0.0
Los Angeles      0	0	162	0.000	0.0
San Diego        0	0	162	0.000	0.0
San Francisco    0	0	162	0.000	0.0

Next, we show how the remaining series of games plays out in the scenario:

Arizona currently has 0 win(s) against Colorado and 0 loss(es).
Arizona wins 13 additional game(s) against Colorado and loses 0.
Arizona wins the series 13 games to 0.
Arizona wins 0 additional game(s) against teams outside the division and loses 110.

Arizona currently has 0 win(s) against Los Angeles and 0 loss(es).
Arizona wins 11 additional game(s) against Los Angeles and loses 2.
Arizona wins the series 11 games to 2.
Arizona wins 0 additional game(s) against teams outside the division and loses 110.

Arizona currently has 0 win(s) against San Diego and 0 loss(es).
Arizona wins 1 additional game(s) against San Diego and loses 12.
Arizona loses the series 1 games to 12.
Arizona wins 0 additional game(s) against teams outside the division and loses 110.

Arizona currently has 0 win(s) against San Francisco and 0 loss(es).
Arizona wins 1 additional game(s) against San Francisco and loses 12.
Arizona loses the series 1 games to 12.
Arizona wins 0 additional game(s) against teams outside the division and loses 110.

Colorado currently has 0 win(s) against Los Angeles and 0 loss(es).
Colorado wins 13 additional game(s) against Los Angeles and loses 0.
Colorado wins the series 13 games to 0.
Colorado wins 0 additional game(s) against teams outside the division and loses 110.

Colorado currently has 0 win(s) against San Diego and 0 loss(es).
Colorado wins 13 additional game(s) against San Diego and loses 0.
Colorado wins the series 13 games to 0.
Colorado wins 0 additional game(s) against teams outside the division and loses 110.

Colorado currently has 0 win(s) against San Francisco and 0 loss(es).
Colorado wins 1 additional game(s) against San Francisco and loses 12.
Colorado loses the series 1 games to 12.
Colorado wins 0 additional game(s) against teams outside the division and loses 110.

Los Angeles currently has 0 win(s) against San Diego and 0 loss(es).
Los Angeles wins 12 additional game(s) against San Diego and loses 1.
Los Angeles wins the series 12 games to 1.
Los Angeles wins 1 additional game(s) against teams outside the division and loses 109.

Los Angeles currently has 0 win(s) against San Francisco and 0 loss(es).
Los Angeles wins 11 additional game(s) against San Francisco and loses 2.
Los Angeles wins the series 11 games to 2.
Los Angeles wins 1 additional game(s) against teams outside the division and loses 109.

San Diego currently has 0 win(s) against San Francisco and 0 loss(es).
San Diego wins 12 additional game(s) against San Francisco and loses 1.
San Diego wins the series 12 games to 1.
San Diego wins 0 additional game(s) against teams outside the division and loses 110.

# San Francisco Giants' magic number
# San Francisco's magic number
# Giants' magic number
# MLB Playoff Race