Seattle Mariners First-Place Clinch Scenario

Seattle's traditional magic number (relative to second-place Texas) is 16 + 131 - 17 + 1 = 131.
Seattle's first-place clinch number is 126.
Seattle must win 126 more games (143 total) to clinch first place.

If Seattle wins 126 more games, their final win total will be at least 143.
The table below shows the best case scenario for each of the other teams if Seattle wins 126 of their remaining 131 games and loses the other 5.
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 Seattle' column gives the
minimum number of games that each team will lose to Seattle if Seattle wins 126 more games. Assuming that a team wins all of its remaining games except for
the games it loses to Seattle, the resulting maximum number of wins is shown in the 'Maximum W' column.

Team             W	L	GL	Losses to Seattle	Maximum W
Texas            16	15	131	      10 - 5 = 5	142
Oakland          15	17	130	      13 - 5 = 8	137
Houston          10	20	132	      13 - 5 = 8	134
Los Angeles      11	20	131	      13 - 5 = 8	134

The table above shows that if Seattle wins 126 more games (143 total), then they will finish the season in first place in the division.

To see that Seattle's first-place clinch number cannot be less than 126, consider the following scenario in which Seattle wins 125 more games (142 total) but does not finish in first place:

Team             W	L	PCT	GB
Texas            142	20	0.877	0.00
Seattle          142	20	0.877	0.00
Los Angeles      79	83	0.488	63.00
Houston          75	87	0.463	67.00
Oakland          37	125	0.228	105.00

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

To construct the scenario, we start with the current standings in the division:
Team             W	L	GL	PCT	GB
Seattle          17	14	131	0.548	0.0
Texas            16	15	131	0.516	1.0
Oakland          15	17	130	0.469	2.5
Los Angeles      11	20	131	0.355	6.0
Houston          10	20	132	0.333	6.5

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


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

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

Oakland currently has 0 wins against Houston and 0 losses.
  Oakland wins 10 additional games against Houston and loses 3.
  Oakland wins the series 10 games to 3

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

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

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

Texas currently has 3 wins against Houston and 4 losses.
  Texas wins 5 additional games against Houston and loses 1.
  Texas wins the series 8 games to 5

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 1 wins against Oakland and 2 losses.
  Texas wins 10 additional games against Oakland and loses 0.
  Texas wins the series 11 games to 2

Texas currently has 1 wins against Seattle and 2 losses.
  Texas wins 6 additional games against Seattle and loses 4.
  Texas wins the series 7 games to 6

Houston wins 52 games agains teams outside the division and loses 35.
Los Angeles wins 51 games agains teams outside the division and loses 28.
Oakland wins 12 games agains teams outside the division and loses 69.
Seattle wins 82 games agains teams outside the division and loses 0.
Texas wins 92 games agains teams outside the division and loses 0.

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