The Mariners’ magic number for the American League West is in the table below, in the Magic column, and it updates on its own as games finish. When it reaches zero the division is clinched.
American League West
| Team | W | L | Pct | GB | L10 | Strk | Home | Road | Magic |
|---|---|---|---|---|---|---|---|---|---|
| Texas Rangers | 78 | 78 | .500 | — | 6-4 | L1 | 44-34 | 34-44 | 6 |
| Houston Astros | 77 | 79 | .494 | 1 | 3-7 | L3 | 39-42 | 38-37 | 8 |
| Seattle Mariners | 73 | 83 | .468 | 5 | 5-5 | W1 | 40-35 | 33-48 | 12 |
| Athletics e | 61 | 95 | .391 | 17 | 3-7 | L6 | 29-46 | 32-49 | 24 |
| Los Angeles Angels e | 60 | 96 | .385 | 18 | 4-6 | L1 | 34-47 | 26-49 | 25 |
Standings from BALLDONTLIE. Updated September 21, 7:51 pm ET.
How the Magic Number Works
A magic number is the combined total of wins by the leader and losses by the closest chaser needed to make the race mathematically over. Every Mariners win drops it by one. Every loss by the second place team drops it by one. When both happen on the same day it drops by two, which is why divisions often clinch on afternoons when the leader is not even playing.
The formula is straightforward: take the number of games the chaser has left, add one, then subtract the number of games the leader is ahead in the loss column. That is why a healthy lead in late September produces a small number very quickly.
What Clinching Would Mean
Under the current playoff format, winning the division rather than taking a wild card spot is the difference between a first round bye and playing a best of three series just to advance. That is the single biggest structural advantage available in the postseason, and it is why teams push for the division title even when a wild card berth is already secure.
The clincher letters beside team names in the table mark teams that have already secured something. For the full picture see our MLB playoff picture, and for the rest of the races see wild card standings.
The Bottom Line
The Magic column in the table above carries the Mariners’ live number for the AL West and updates automatically, so it reflects last night’s results rather than a hand typed figure.