SanFrancisco Giants First-Place Elimination Scenario
SanFrancisco must win 26 more games (78 total) to avoid elimination from first place.
Here are the final standings in a scenario in which SanFrancisco finishes in first place with 78 wins:

Team             W	L	PCT	GB
SanFrancisco     78	84	0.481	0.00
LADodgers        78	84	0.481	0.00
Colorado         77	85	0.475	1.00
Arizona          77	85	0.475	1.00
SanDiego         76	86	0.469	2.00

Tie breakers
SanFrancisco wins the series with LADodgers 10 games to 3

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
LADodgers        78	51	33	0.605	0.0
SanDiego         69	60	33	0.535	9.0
Arizona          68	61	33	0.527	10.0
SanFrancisco     52	76	34	0.406	25.5
Colorado         50	78	34	0.391	27.5

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

Arizona currently has 6 win(s) against Colorado and 4 loss(es).
Arizona wins 0 additional game(s) against Colorado and loses 3.
Arizona loses the series 6 games to 7.
Arizona wins 6 additional game(s) against teams outside the division and loses 17.

Arizona currently has 7 win(s) against LADodgers and 6 loss(es).
Arizona and LADodgers have no remaining games.
Arizona wins the series 7 games to 6.
Arizona wins 6 additional game(s) against teams outside the division and loses 17.

Arizona currently has 5 win(s) against SanDiego and 5 loss(es).
Arizona wins 2 additional game(s) against SanDiego and loses 1.
Arizona wins the series 7 games to 6.
Arizona wins 6 additional game(s) against teams outside the division and loses 17.

Arizona currently has 8 win(s) against SanFrancisco and 1 loss(es).
Arizona wins 1 additional game(s) against SanFrancisco and loses 3.
Arizona wins the series 9 games to 4.
Arizona wins 6 additional game(s) against teams outside the division and loses 17.

Colorado currently has 3 win(s) against LADodgers and 10 loss(es).
Colorado and LADodgers have no remaining games.
Colorado loses the series 3 games to 10.
Colorado wins 20 additional game(s) against teams outside the division and loses 7.

Colorado currently has 1 win(s) against SanDiego and 8 loss(es).
Colorado wins 4 additional game(s) against SanDiego and loses 0.
Colorado loses the series 5 games to 8.
Colorado wins 20 additional game(s) against teams outside the division and loses 7.

Colorado currently has 7 win(s) against SanFrancisco and 6 loss(es).
Colorado and SanFrancisco have no remaining games.
Colorado wins the series 7 games to 6.
Colorado wins 20 additional game(s) against teams outside the division and loses 7.

LADodgers currently has 7 win(s) against SanDiego and 3 loss(es).
LADodgers wins 0 additional game(s) against SanDiego and loses 3.
LADodgers wins the series 7 games to 6.
LADodgers wins 0 additional game(s) against teams outside the division and loses 24.

LADodgers currently has 3 win(s) against SanFrancisco and 4 loss(es).
LADodgers wins 0 additional game(s) against SanFrancisco and loses 6.
LADodgers loses the series 3 games to 10.
LADodgers wins 0 additional game(s) against teams outside the division and loses 24.

SanDiego currently has 6 win(s) against SanFrancisco and 4 loss(es).
SanDiego wins 0 additional game(s) against SanFrancisco and loses 3.
SanDiego loses the series 6 games to 7.
SanDiego wins 3 additional game(s) against teams outside the division and loses 17.

# SanFrancisco Giants' magic number
# SanFrancisco's magic number
# Giants' magic number
# MLB Playoff Race