Seattle Mariners First-Place Eliminiation Scenario
Seattle must win 22 more games (35 total) to avoid elimination from first place.
Here are the final standings in a scenario in which Seattle finishes in first place with 35 wins:

Team             W	L	PCT	GB
Seattle          35	127	0.216	0.00
Los Angeles      35	127	0.216	0.00
Oakland          35	127	0.216	0.00
Houston          35	127	0.216	0.00
Texas            35	127	0.216	0.00

Tie breakers
Seattle wins the series with Houston 7 games to 6
Seattle wins the series with Los Angeles 7 games to 6
Seattle wins the series with Oakland 7 games to 6
Seattle wins the series with Texas 7 games to 6

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Texas            14	10	138	0.583	0.0
Houston          13	11	138	0.542	1.0
Seattle          13	11	138	0.542	1.0
Los Angeles      11	12	139	0.478	2.5
Oakland          11	13	138	0.458	3.0

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

Houston currently has 2 win(s) against Los Angeles and 1 loss(es).
Houston wins 10 additional game(s) against Los Angeles and loses 0.
Houston wins the series 12 games to 1.
Houston wins 0 additional game(s) against teams outside the division and loses 92.

Houston currently has 0 win(s) against Oakland and 0 loss(es).
Houston wins 6 additional game(s) against Oakland and loses 7.
Houston loses the series 6 games to 7.
Houston wins 0 additional game(s) against teams outside the division and loses 92.

Houston currently has 1 win(s) against Seattle and 2 loss(es).
Houston wins 5 additional game(s) against Seattle and loses 5.
Houston loses the series 6 games to 7.
Houston wins 0 additional game(s) against teams outside the division and loses 92.

Houston currently has 0 win(s) against Texas and 0 loss(es).
Houston wins 1 additional game(s) against Texas and loses 12.
Houston loses the series 1 games to 12.
Houston wins 0 additional game(s) against teams outside the division and loses 92.

Los Angeles currently has 0 win(s) against Oakland and 0 loss(es).
Los Angeles wins 11 additional game(s) against Oakland and loses 2.
Los Angeles wins the series 11 games to 2.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 93.

Los Angeles currently has 0 win(s) against Seattle and 0 loss(es).
Los Angeles wins 6 additional game(s) against Seattle and loses 7.
Los Angeles loses the series 6 games to 7.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 93.

Los Angeles currently has 0 win(s) against Texas and 3 loss(es).
Los Angeles wins 7 additional game(s) against Texas and loses 3.
Los Angeles wins the series 7 games to 6.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 93.

Oakland currently has 2 win(s) against Seattle and 2 loss(es).
Oakland wins 4 additional game(s) against Seattle and loses 5.
Oakland loses the series 6 games to 7.
Oakland wins 0 additional game(s) against teams outside the division and loses 92.

Oakland currently has 1 win(s) against Texas and 1 loss(es).
Oakland wins 11 additional game(s) against Texas and loses 0.
Oakland wins the series 12 games to 1.
Oakland wins 0 additional game(s) against teams outside the division and loses 92.

Seattle currently has 3 win(s) against Texas and 0 loss(es).
Seattle wins 4 additional game(s) against Texas and loses 6.
Seattle wins the series 7 games to 6.
Seattle wins 1 additional game(s) against teams outside the division and loses 95.

# Seattle Mariners' magic number
# Seattle's magic number
# Mariners' magic number
# MLB Playoff Race