Oakland Athletics First-Place Clinch Scenario

Oakland's traditional magic number (relative to second-place Texas) is 12 + 139 - 13 + 1 = 139.
Oakland's first-place clinch number is 134.
Oakland must win 134 more games (147 total) to clinch first place.

If Oakland wins 134 more games, their final win total will be at least 147.
The table below shows the best case scenario for each of the other teams if Oakland wins 134 of their remaining 138 games and loses the other 4.
For each team, the table shows the current record (number of wins (W) and losses (L)) and the number of games that team has
left to play (GL) in the regular season. Taking the schedule of games left to play into account, the 'Losses to Oakland' column gives the
minimum number of games that each team will lose to Oakland if Oakland wins 134 more games. Assuming that a team wins all of its remaining games except for
the games it loses to Oakland, the resulting maximum number of wins is shown in the 'Maximum W' column.

Team             W	L	GL	Losses to Oakland	Maximum W
Texas            12	11	139	       9 - 4 = 5	146
Houston          9	16	137	      10 - 4 = 6	140
Seattle          10	15	137	      11 - 4 = 7	140
Los Angeles      11	14	137	      13 - 4 = 9	139

The table above shows that if Oakland wins 134 more games (147 total), then they will finish the season in first place in the division.

To see that Oakland's first-place clinch number cannot be less than 134, consider the following scenario in which Oakland wins 133 more games (146 total) but does not finish in first place:

Team             W	L	PCT	GB
Texas            146	16	0.901	0.00
Oakland          146	16	0.901	0.00
Houston          67	95	0.414	79.00
Los Angeles      66	96	0.407	80.00
Seattle          42	120	0.259	104.00

Tie breakers
Texas wins the season series with Oakland 7 games to 6.

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Oakland          13	11	138	0.542	0.0
Texas            12	11	139	0.522	0.5
Los Angeles      11	14	137	0.440	2.5
Seattle          10	15	137	0.400	3.5
Houston          9	16	137	0.360	4.5

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


Houston currently has 2 wins against Los Angeles and 2 losses.
  Houston wins 5 additional games against Los Angeles and loses 4.
  Houston wins the series 7 games to 6

Houston currently has 0 wins against Seattle and 4 losses.
  Houston wins 9 additional games against Seattle and loses 0.
  Houston wins the series 9 games to 4

Oakland currently has 2 wins against Houston and 1 losses.
  Oakland wins 10 additional games against Houston and loses 0.
  Oakland wins the series 12 games to 1

Oakland currently has 0 wins against Los Angeles and 0 losses.
  Oakland wins 13 additional games against Los Angeles and loses 0.
  Oakland wins the series 13 games to 0

Oakland currently has 2 wins against Seattle and 0 losses.
  Oakland wins 11 additional games against Seattle and loses 0.
  Oakland wins the series 13 games to 0

Seattle currently has 1 wins against Los Angeles and 2 losses.
  Seattle wins 10 additional games against Los Angeles and loses 0.
  Seattle wins the series 11 games to 2

Texas currently has 0 wins against Houston and 0 losses.
  Texas wins 13 additional games against Houston and loses 0.
  Texas wins the series 13 games to 0

Texas currently has 0 wins against Los Angeles and 0 losses.
  Texas wins 13 additional games against Los Angeles and loses 0.
  Texas wins the series 13 games to 0

Texas currently has 2 wins against Oakland and 2 losses.
  Texas wins 5 additional games against Oakland and loses 4.
  Texas wins the series 7 games to 6

Texas currently has 4 wins against Seattle and 2 losses.
  Texas wins 7 additional games against Seattle and loses 0.
  Texas wins the series 11 games to 2

Houston wins 44 games agains teams outside the division and loses 52.
Los Angeles wins 51 games agains teams outside the division and loses 41.
Oakland wins 95 games agains teams outside the division and loses 0.
Seattle wins 22 games agains teams outside the division and loses 78.
Texas wins 96 games agains teams outside the division and loses 1.

Combining the current standings with the wins and losses from the scenario results in the final standings listed above.
# Oakland Athletics' magic number
# Oakland's magic number
# Athletics' magic number
# MLB Playoff Race