articleThe Brief After a three-game sweep of the Houston Astros this weekend, the Seattle Mariners are on the verge of winning the AL West for the first time since 2001. It will be just the sixth playoff appearance in franchise history when the Mariners clinch their postseason spot. Seattle has earned a playoff three times as the winner of the AL West (1995, 1997, 2001), and twice as a Wild Card (2000, 2022). After a three-game sweep of the Houston Astros this weekend, the Seattle Mariners are on the verge of winning the AL West for the first time in over 20 years. The magic number for the AL West is down to three for Seattle, meaning any combination of Mariners wins or Astros losses totaling three over the final six days of the season will give the Mariners the AL West title.