Arizona Diamondbacks First-Place Eliminiation Scenario
Arizona must win 20 more games (46 total) to avoid elimination from first place.
Here are the final standings in a scenario in which Arizona finishes in first place with 46 wins:

Team             W	L	PCT	GB
Arizona          46	116	0.284	0.00
Los Angeles      46	116	0.284	0.00
San Diego        46	116	0.284	0.00
San Francisco    46	116	0.284	0.00
Colorado         45	117	0.278	1.00

Tie breakers
Arizona wins the series with Los Angeles 8 games to 5
Arizona wins the series with San Diego 8 games to 5
Arizona wins the series with San Francisco 7 games to 6

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Los Angeles      32	19	111	0.627	0.0
San Francisco    30	21	111	0.588	2.0
San Diego        28	21	113	0.571	3.0
Arizona          26	25	111	0.510	6.0
Colorado         9	42	111	0.176	23.0

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

Arizona currently has 2 win(s) against Colorado and 1 loss(es).
Arizona wins 0 additional game(s) against Colorado and loses 10.
Arizona loses the series 2 games to 11.
Arizona wins 2 additional game(s) against teams outside the division and loses 70.

Arizona currently has 3 win(s) against Los Angeles and 4 loss(es).
Arizona wins 5 additional game(s) against Los Angeles and loses 1.
Arizona wins the series 8 games to 5.
Arizona wins 2 additional game(s) against teams outside the division and loses 70.

Arizona currently has 0 win(s) against San Diego and 0 loss(es).
Arizona wins 8 additional game(s) against San Diego and loses 5.
Arizona wins the series 8 games to 5.
Arizona wins 2 additional game(s) against teams outside the division and loses 70.

Arizona currently has 2 win(s) against San Francisco and 1 loss(es).
Arizona wins 5 additional game(s) against San Francisco and loses 5.
Arizona wins the series 7 games to 6.
Arizona wins 2 additional game(s) against teams outside the division and loses 70.

Colorado currently has 0 win(s) against Los Angeles and 3 loss(es).
Colorado wins 10 additional game(s) against Los Angeles and loses 0.
Colorado wins the series 10 games to 3.
Colorado wins 0 additional game(s) against teams outside the division and loses 75.

Colorado currently has 1 win(s) against San Diego and 5 loss(es).
Colorado wins 7 additional game(s) against San Diego and loses 0.
Colorado wins the series 8 games to 5.
Colorado wins 0 additional game(s) against teams outside the division and loses 75.

Colorado currently has 1 win(s) against San Francisco and 3 loss(es).
Colorado wins 9 additional game(s) against San Francisco and loses 0.
Colorado wins the series 10 games to 3.
Colorado wins 0 additional game(s) against teams outside the division and loses 75.

Los Angeles currently has 0 win(s) against San Diego and 0 loss(es).
Los Angeles wins 0 additional game(s) against San Diego and loses 13.
Los Angeles loses the series 0 games to 13.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 69.

Los Angeles currently has 0 win(s) against San Francisco and 0 loss(es).
Los Angeles wins 13 additional game(s) against San Francisco and loses 0.
Los Angeles wins the series 13 games to 0.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 69.

San Diego currently has 2 win(s) against San Francisco and 0 loss(es).
San Diego wins 0 additional game(s) against San Francisco and loses 11.
San Diego loses the series 2 games to 11.
San Diego wins 0 additional game(s) against teams outside the division and loses 69.

# Arizona Diamondbacks' magic number
# Arizona's magic number
# Diamondbacks' magic number
# MLB Playoff Race