Pete Alonso Hits 300th Career Home Run Against Former Team Mets at Citi Field
Published · Updated
Cited: MLB.com, USA Today, Camden Chat
TL;DR
On September 15, 2026, Pete Alonso reached a major career milestone by hitting his 300th home run in dramatic fashion—against his former team, the New York Mets, at Citi Field. The solo shot in the top of the ninth inning tied the game 3-3 and drew an emotional curtain call from the same fans who cheered him for seven seasons. Alonso, now with the Baltimore Orioles, became the 19th active player to reach the 300-homer mark and the 20th in AL/NL history to achieve it against a former club.
Why now
On September 15, 2026, Pete Alonso reached a major career milestone by hitting his 300th home run in dramatic fashion—against his former team, the New York Mets, at Citi Field. The solo shot in the top of the ninth inning tied the game 3-3 and drew an emotional curtain call from the same fans who cheered him for seven seasons. Alonso, now with the Baltimore Orioles, became the 19th active player to reach the 300-homer mark and the 20th in AL/NL history to achieve it against a former club.
Agree / conflict
- Milestone Moment: Alonso’s 300th home run came in the ninth inning off Mets pitcher Kodai Senga, tying the game. - Historic Context: He is the 20th player in AL/NL history to hit his 300th homer against a former team, a feat last accomplished by Andrew McCutchen in 2024. - Fan Reaction: Despite being an opponent, Mets fans gave Alonso a standing ovation, chanted his name, and called for a curtain call—a rare show of respect for a visiting player. - Contract Background: Alonso signed a five-year, $155 million deal with Baltimore in December 2025 after the Mets declined to match his free-agent demands. - Why This Matters: The milestone highlights the emotional weight of a star player returning to his former home ballpark and achieving a career landmark in front of fans who still adore him.
Takeaway
- For Mets Fans: Alonso’s milestone is a bittersweet reminder of what the team lost. His curtain call shows that the bond between player and city remains strong. - For Orioles Fans: Alonso continues to deliver clutch performances. His 300th homer is a highlight in a season that has otherwise been disappointing for Baltimore. - For Baseball Enthusiasts: This moment underscores the rarity and emotional weight of hitting a major milestone against a former team. It’s a story of respect, nostalgia, and the enduring power of sports. - Key Action: Share this story with fellow baseball fans to celebrate a historic moment that blends individual achievement with team loyalty.
- Milestone Moment: Alonso’s 300th home run came in the ninth inning off Mets pitcher Kodai Senga, tying the game. - Historic Context: He is the 20th player in AL/NL history to hit his 300th homer against a former team, a feat last accomplished by Andrew McCutchen in 2024. - Fan Reaction: Despite being an opponent, Mets fans gave Alonso a standing ovation, chanted his name, and called for a curtain call—a rare show of respect for a visiting player. - Contract Background: Alonso signed a five-year, $155 million deal with Baltimore in December 2025 after the Mets declined to match his free-agent demands. - Why This Matters: The milestone highlights the emotional weight of a star player returning to his former home ballpark and achieving a career landmark in front of fans who still adore him.
Pete Alonso’s journey to 300 home runs is a story of consistency, power, and a deep connection with Mets fans. Drafted by the Mets in the second round of the 2016 MLB Draft, Alonso burst onto the scene in 2019 by setting the rookie home run record (53) and winning the NL Rookie of the Year. Over seven seasons in New York, he became the franchise’s all-time home run leader (264 homers), made five All-Star teams, and won two Home Run Derbies. His nickname “Polar Bear,” coined by teammate Todd Frazier, became synonymous with his powerful, fan-friendly persona.
When the Mets let him walk in free agency after the 2025 season—opting not to match Baltimore’s $155 million offer—it left a void in Queens. The decision was widely criticized, especially as the Mets struggled in 2026, falling 18.5 games behind the Braves in the NL East. Meanwhile, Alonso continued to produce for the Orioles, entering the series hitting .269 with 35 homers and 100 RBI.
The timing of the milestone was almost poetic: a game-tying homer in the ninth inning, at his former home park, against his former team. The Citi Field crowd, which had already given him a warm welcome on Monday night, erupted again. Alonso’s curtain call was a testament to the lasting bond between player and fanbase—a rare moment in modern sports where loyalty transcended team colors.
From a historical perspective, Alonso joins an elite group of players who have hit their 300th homer against a former club, including Andrew McCutchen, Jim Thome, and Frank Robinson. The feat underscores the emotional complexity of facing a team that once defined your career.
Actionable Takeaway: For fans and analysts, this moment serves as a reminder that player legacies are built on more than statistics. Alonso’s ability to earn respect from a rival crowd speaks to his character and the impact he had on the Mets organization. Teams should consider the long-term value of homegrown stars beyond just on-field production.
Do you think the Mets made a mistake by letting Alonso walk? How does his 300th homer rank among the most memorable milestones in recent MLB history? Share this article with others who need to stay ahead of this trend! Let us know your thoughts in the comments or on social media—use the buttons below to share on Twitter/X, LinkedIn, or Reddit.
FAQ
Who is the 19th active player to reach 300 home runs?
Pete Alonso is the 19th active player to reach 300 career home runs.
How many of Alonso’s 300 homers came with the Mets?
Alonso hit 264 of his 300 home runs during his seven-year tenure with the Mets.
What was the reaction of Mets fans when Alonso hit the homer?
Mets fans cheered loudly, chanted his name, and called for a curtain call, which Alonso acknowledged from the third-base dugout.
When was the last time a player hit his 300th homer against a former team before Alonso?
Andrew McCutchen was the last to do so, hitting his 300th homer for the Pirates against the Phillies on April 14, 2024.
What contract did Alonso sign with the Orioles?
Alonso signed a five-year, $155 million contract with the Baltimore Orioles in December 2025.
Sources
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