Houston Astros First-Place Eliminiation Scenario
Houston must win 13 more games (49 total) to avoid elimination from first place.
Here are the final standings in a scenario in which Houston finishes in first place with 49 wins:

Team             W	L	PCT	GB
Houston          49	113	0.302	0.00
Seattle          48	114	0.296	1.00
Texas            48	114	0.296	1.00
Los Angeles      48	114	0.296	1.00
Oakland          47	115	0.290	2.00

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Houston          36	30	96	0.545	0.0
Seattle          33	33	96	0.500	3.0
Los Angeles      32	34	96	0.485	4.0
Texas            32	35	95	0.478	4.5
Oakland          26	43	93	0.377	11.5

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

Houston currently has 2 win(s) against Los Angeles and 1 loss(es).
Houston wins 5 additional game(s) against Los Angeles and loses 5.
Houston wins the series 7 games to 6.
Houston wins 1 additional game(s) against teams outside the division and loses 59.

Houston currently has 2 win(s) against Oakland and 0 loss(es).
Houston wins 0 additional game(s) against Oakland and loses 11.
Houston loses the series 2 games to 11.
Houston wins 1 additional game(s) against teams outside the division and loses 59.

Houston currently has 4 win(s) against Seattle and 3 loss(es).
Houston wins 3 additional game(s) against Seattle and loses 3.
Houston wins the series 7 games to 6.
Houston wins 1 additional game(s) against teams outside the division and loses 59.

Houston currently has 2 win(s) against Texas and 2 loss(es).
Houston wins 4 additional game(s) against Texas and loses 5.
Houston loses the series 6 games to 7.
Houston wins 1 additional game(s) against teams outside the division and loses 59.

Los Angeles currently has 6 win(s) against Oakland and 0 loss(es).
Los Angeles wins 2 additional game(s) against Oakland and loses 5.
Los Angeles wins the series 8 games to 5.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 61.

Los Angeles currently has 2 win(s) against Seattle and 3 loss(es).
Los Angeles wins 4 additional game(s) against Seattle and loses 4.
Los Angeles loses the series 6 games to 7.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 61.

Los Angeles currently has 0 win(s) against Texas and 3 loss(es).
Los Angeles wins 5 additional game(s) against Texas and loses 5.
Los Angeles loses the series 5 games to 8.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 61.

Oakland currently has 3 win(s) against Seattle and 4 loss(es).
Oakland wins 4 additional game(s) against Seattle and loses 2.
Oakland wins the series 7 games to 6.
Oakland wins 0 additional game(s) against teams outside the division and loses 63.

Oakland currently has 5 win(s) against Texas and 2 loss(es).
Oakland wins 1 additional game(s) against Texas and loses 5.
Oakland loses the series 6 games to 7.
Oakland wins 0 additional game(s) against teams outside the division and loses 63.

Seattle currently has 5 win(s) against Texas and 1 loss(es).
Seattle wins 6 additional game(s) against Texas and loses 1.
Seattle wins the series 11 games to 2.
Seattle wins 0 additional game(s) against teams outside the division and loses 69.

# Houston Astros' magic number
# Houston's magic number
# Astros' magic number
# MLB Playoff Race