What happened: The final day of the regular season establishes the remaining postseason spots. The Houston Astros secure the AL West title with a victory or a Rangers loss. In the National League, the Philadelphia Phillies secure a playoff berth with a victory or a Diamondbacks loss.
Why it matters: These outcomes determine the postseason bracket and the AL West champion, who earns a critical first-round bye. The final day eliminates any margin for error, forcing teams to rely on scoreboard watching if they stumble in their own matchups.
By the numbers: Philadelphia enters the day with an 81-74 record and a four-game losing streak. Houston and the Rangers are tied for the division lead.
What to watch: All thirty teams conclude their season schedules on Sunday.