Phillies Clinch, Mariners Pass Astros: MLB Magic Numbers & Tiebreakers (9/15/25)

Key Developments in the MLB Regular Season

The third-to-last Sunday of the MLB regular season was filled with exciting developments across the league. The Philadelphia Phillies secured a playoff berth despite not clinching their second consecutive NL East title, while the Seattle Mariners took sole possession of first place in the AL West. Meanwhile, the New York Mets ended an eight-game losing streak to strengthen their wild-card lead.

The Phillies fell 10-3 at home to the Royals, which prevented them from securing the NL East title. However, they still managed to qualify for the postseason after the San Francisco Giants lost 10-2 to the Los Angeles Dodgers. This win by the Dodgers ensured that the Phillies would make it to the playoffs.

In the AL West, the Mariners overtook the Houston Astros to claim first place for the first time since June 1. Their 11-2 victory over the Angels featured Cal Raleigh hitting his 54th home run of the season, tying Mickey Mantle’s record for most home runs by a switch-hitter. The Astros, on the other hand, lost 8-3 to the Atlanta Braves, with Jose Altuve sidelined due to right foot soreness.

The Mets extended their lead in the NL wild-card race with a 5-2, 10-inning win over the Texas Rangers. They also snapped an eight-game losing streak when Pete Alonso hit a three-run, walk-off homer at Citi Field.

Other Notable Games and Standings Updates

In Toronto, the Blue Jays dominated the Baltimore Orioles 11-2, completing a weekend sweep and extending their lead over the New York Yankees to four games. In Boston, the Red Sox scored six first-inning runs against Will Warren and held on for a 6-4 win over the Yankees, who wasted Aaron Judge’s 48th home run.

The San Diego Padres beat the Colorado Rockies 9-6, maintaining their position as 2.5 games behind the NL West-leading Dodgers and five games ahead of the Mets for the second NL wild-card spot. In Sacramento, California, rookie Nick Kurtz hit his 32nd home run in the Oakland Athletics’ 7-4 win over the Cincinnati Reds, who dropped 2.5 games behind the Mets for the last NL wild-card spot.

In Minneapolis, James McCann contributed two hits, including a home run and four RBIs, as the Arizona Diamondbacks defeated the Minnesota Twins 6-4. The St. Louis Cardinals ended a five-game losing streak with a 3-2 win over the Milwaukee Brewers, remaining four games out of the NL wild-card race.

In Chicago, Nico Hoerner’s two-run double in the seventh inning led the Cubs to a 4-3 win over the Tampa Bay Rays. The Cubs currently hold the first NL wild-card spot with a magic number of four to clinch a playoff berth. In Miami, Keider Montero pitched five shutout innings in a 2-0 win for the Detroit Tigers over the Marlins, extending their 6.5-game lead over the Cleveland Guardians in the AL Central.

In Cleveland, Bo Naylor hit a tiebreaking home run in the seventh inning to help the Guardians edge the White Sox 3-2, keeping them 2.5 games out of the AL wild-card race.

Playoff Implications and Schedules

As the season progresses, teams are focused on securing playoff spots and improving their standings. Here's a look at the magic numbers and remaining schedules for key contenders:

AL East

• Toronto Blue Jays: First in the AL East with a 4-game lead over the Yankees. Magic number to clinch the division is 9.
• New York Yankees: Second in the AL East, trailing the Blue Jays by 4 games. Magic number to clinch the playoffs is 9.
• Boston Red Sox: Third in the AL East, trailing the Blue Jays by 5.5 games. Magic number to clinch the playoffs is 10.

AL Central

• Detroit Tigers: First in the AL Central with a 6.5-game lead over the Guardians. Magic number to clinch the division is 7.
• Cleveland Guardians: Second in the AL Central, trailing the Tigers by 6.5 games. Magic number for playoff elimination is 11.

AL West

• Seattle Mariners: First in the AL West, leading the Astros by 1 game. Magic number to clinch the division is 12.
• Houston Astros: Second in the AL West, trailing the Mariners by 1 game. Magic number to clinch the playoffs is 11.
• Texas Rangers: Third in the AL West, trailing the Mariners by 3 games. Magic number for playoff elimination is 11.

NL East

• Philadelphia Phillies: First in the NL East, leading the Mets by 12 games. Clinched a playoff berth on September 14.
• New York Mets: Second in the NL East, trailing the Phillies by 12 games. Magic number to clinch the playoffs is 12.

NL Central

• Milwaukee Brewers: First in the NL Central, leading the Cubs by 5.5 games. Clinched a playoff berth on September 13.
• Chicago Cubs: Second in the NL Central, trailing the Brewers by 5.5 games. Magic number to clinch the playoffs is 4.

NL West

• Los Angeles Dodgers: First in the NL West, leading the Padres by 2.5 games. Magic number to clinch the division is 11.
• San Diego Padres: Second in the NL West, trailing the Dodgers by 2.5 games. Magic number to clinch the playoffs is 7.
• San Francisco Giants: Fourth in the NL West, trailing the Dodgers by 9 games. Magic number for playoff elimination is 12.

Playoff Matchups

If the postseason began on September 15, the following matchups would be expected: - AL Wild Card Series (best-of-3): Blue Jays (1) vs. Tigers (2), Astros (6) vs. Mariners (3), Red Sox (5) vs. Yankees (4). - NL Wild Card Series (best-of-3): Brewers (1) vs. Phillies (2), Mets (6) vs. Dodgers (3), Padres (5) vs. Cubs (4).