Oakland Athletics First-Place Elimination Scenario
Oakland must win 14 more games (53 total) to avoid elimination from first place.
Here are the final standings in a scenario in which Oakland finishes in first place with 53 wins:

Team             W	L	PCT	GB
Oakland          53	109	0.327	0.00
Seattle          53	109	0.327	0.00
Houston          52	110	0.321	1.00
Los Angeles      52	110	0.321	1.00
Texas            52	110	0.321	1.00

Tie breakers
Oakland wins the series with Seattle 8 games to 5

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Seattle          41	41	80	0.500	0.0
Houston          40	43	79	0.482	1.5
Oakland          39	42	81	0.481	1.5
Texas            39	42	81	0.481	1.5
Los Angeles      34	48	80	0.415	7.0

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

Oakland currently has 3 win(s) against Houston and 3 loss(es).
Oakland wins 3 additional game(s) against Houston and loses 4.
Oakland loses the series 6 games to 7.
Oakland wins 0 additional game(s) against teams outside the division and loses 56.

Oakland currently has 5 win(s) against Los Angeles and 3 loss(es).
Oakland wins 5 additional game(s) against Los Angeles and loses 0.
Oakland wins the series 10 games to 3.
Oakland wins 0 additional game(s) against teams outside the division and loses 56.

Oakland currently has 2 win(s) against Seattle and 4 loss(es).
Oakland wins 6 additional game(s) against Seattle and loses 1.
Oakland wins the series 8 games to 5.
Oakland wins 0 additional game(s) against teams outside the division and loses 56.

Oakland currently has 4 win(s) against Texas and 3 loss(es).
Oakland wins 0 additional game(s) against Texas and loses 6.
Oakland loses the series 4 games to 9.
Oakland wins 0 additional game(s) against teams outside the division and loses 56.

Houston currently has 3 win(s) against Los Angeles and 4 loss(es).
Houston wins 5 additional game(s) against Los Angeles and loses 1.
Houston wins the series 8 games to 5.
Houston wins 0 additional game(s) against teams outside the division and loses 55.

Houston currently has 1 win(s) against Seattle and 7 loss(es).
Houston wins 1 additional game(s) against Seattle and loses 4.
Houston loses the series 2 games to 11.
Houston wins 0 additional game(s) against teams outside the division and loses 55.

Houston currently has 5 win(s) against Texas and 2 loss(es).
Houston wins 2 additional game(s) against Texas and loses 4.
Houston wins the series 7 games to 6.
Houston wins 0 additional game(s) against teams outside the division and loses 55.

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 49.

Los Angeles currently has 3 win(s) against Texas and 0 loss(es).
Los Angeles wins 7 additional game(s) against Texas and loses 3.
Los Angeles wins the series 10 games to 3.
Los Angeles wins 0 additional game(s) against teams outside the division and loses 49.

Seattle currently has 2 win(s) against Texas and 4 loss(es).
Seattle wins 7 additional game(s) against Texas and loses 0.
Seattle wins the series 9 games to 4.
Seattle wins 0 additional game(s) against teams outside the division and loses 51.

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