Houston Astros First-Place Elimination Scenario
Houston must win 17 more games (44 total) to avoid elimination from first place.
Here are the final standings in a scenario in which Houston finishes in first place with 44 wins:

Team             W	L	PCT	GB
Houston          44	118	0.272	0.00
Los Angeles      44	118	0.272	0.00
Seattle          42	120	0.259	2.00
Oakland          42	120	0.259	2.00
Texas            42	120	0.259	2.00

Tie breakers
Houston wins the series with Los Angeles 11 games to 2

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Seattle          30	29	103	0.508	0.0
Oakland          28	30	104	0.483	1.5
Texas            27	31	104	0.466	2.5
Houston          27	33	102	0.450	3.5
Los Angeles      23	36	103	0.390	7.0

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

Houston currently has 2 win(s) against Los Angeles and 2 loss(es).
Houston wins 9 additional game(s) against Los Angeles and loses 0.
Houston wins the series 11 games to 2.
Houston wins 0 additional game(s) against teams outside the division and loses 72.

Houston currently has 1 win(s) against Oakland and 2 loss(es).
Houston wins 3 additional game(s) against Oakland and loses 7.
Houston loses the series 4 games to 9.
Houston wins 0 additional game(s) against teams outside the division and loses 72.

Houston currently has 1 win(s) against Seattle and 7 loss(es).
Houston wins 4 additional game(s) against Seattle and loses 1.
Houston loses the series 5 games to 8.
Houston wins 0 additional game(s) against teams outside the division and loses 72.

Houston currently has 5 win(s) against Texas and 2 loss(es).
Houston wins 1 additional game(s) against Texas and loses 5.
Houston loses the series 6 games to 7.
Houston wins 0 additional game(s) against teams outside the division and loses 72.

Los Angeles currently has 1 win(s) against Oakland and 3 loss(es).
Los Angeles wins 7 additional game(s) against Oakland and loses 2.
Los Angeles wins the series 8 games to 5.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 65.

Los Angeles currently has 2 win(s) against Seattle and 1 loss(es).
Los Angeles wins 10 additional game(s) against Seattle and loses 0.
Los Angeles wins the series 12 games to 1.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 65.

Los Angeles currently has 3 win(s) against Texas and 0 loss(es).
Los Angeles wins 4 additional game(s) against Texas and loses 6.
Los Angeles wins the series 7 games to 6.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 65.

Oakland currently has 2 win(s) against Seattle and 4 loss(es).
Oakland wins 2 additional game(s) against Seattle and loses 5.
Oakland loses the series 4 games to 9.
Oakland wins 0 additional game(s) against teams outside the division and loses 72.

Oakland currently has 4 win(s) against Texas and 3 loss(es).
Oakland wins 3 additional game(s) against Texas and loses 3.
Oakland wins the series 7 games to 6.
Oakland wins 0 additional game(s) against teams outside the division and loses 72.

Seattle currently has 2 win(s) against Texas and 4 loss(es).
Seattle wins 6 additional game(s) against Texas and loses 1.
Seattle wins the series 8 games to 5.
Seattle wins 0 additional game(s) against teams outside the division and loses 74.

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