Oakland Athletics First-Place Eliminiation Scenario
Oakland must win 22 more games (59 total) to avoid elimination from first place.
Here are the final standings in a scenario in which Oakland finishes in first place with 59 wins:

Team             W	L	PCT	GB
Oakland          59	103	0.364	0.00
Houston          59	103	0.364	0.00
Seattle          58	104	0.358	1.00
Los Angeles      58	104	0.358	1.00
Texas            58	104	0.358	1.00

Tie breakers
Oakland wins the series with Houston 9 games to 4

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Houston          53	35	74	0.602	0.0
Seattle          46	42	74	0.523	7.0
Los Angeles      43	44	75	0.494	9.5
Texas            43	45	74	0.489	10.0
Oakland          37	53	72	0.411	17.0

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

Houston currently has 4 win(s) against Los Angeles and 2 loss(es).
Houston wins 2 additional game(s) against Los Angeles and loses 5.
Houston loses the series 6 games to 7.
Houston wins 0 additional game(s) against teams outside the division and loses 45.

Houston currently has 4 win(s) against Oakland and 2 loss(es).
Houston wins 0 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 45.

Houston currently has 4 win(s) against Seattle and 3 loss(es).
Houston wins 0 additional game(s) against Seattle and loses 6.
Houston loses the series 4 games to 9.
Houston wins 0 additional game(s) against teams outside the division and loses 45.

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 0 additional game(s) against teams outside the division and loses 45.

Los Angeles currently has 7 win(s) against Oakland and 0 loss(es).
Los Angeles wins 0 additional game(s) against Oakland 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 44.

Los Angeles currently has 2 win(s) against Seattle and 3 loss(es).
Los Angeles wins 3 additional game(s) against Seattle 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 44.

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 44.

Oakland currently has 3 win(s) against Seattle and 4 loss(es).
Oakland wins 6 additional game(s) against Seattle and loses 0.
Oakland wins the series 9 games to 4.
Oakland wins 0 additional game(s) against teams outside the division and loses 47.

Oakland currently has 5 win(s) against Texas and 2 loss(es).
Oakland wins 3 additional game(s) against Texas and loses 3.
Oakland wins the series 8 games to 5.
Oakland wins 0 additional game(s) against teams outside the division and loses 47.

Seattle currently has 7 win(s) against Texas and 2 loss(es).
Seattle wins 0 additional game(s) against Texas and loses 4.
Seattle wins the series 7 games to 6.
Seattle wins 1 additional game(s) against teams outside the division and loses 49.

# Oakland Athletics' magic number
# Oakland's magic number
# Athletics' magic number
# MLB Playoff Race