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Pete Alonso has hit plenty of memorable home runs during his major league career.
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Home run No. 300 might be impossible to top.
Alonso reached the milestone Tuesday night while wearing a Baltimore Orioles uniform, but he did it in the stadium where he became one of baseball’s most recognizable sluggers. Facing his former New York Mets at Citi Field, Alonso launched a game-tying home run in the ninth inning to become the latest member of MLB’s 300-homer club.
The reaction made the moment even more unusual.
Instead of showering the visiting slugger with boos, thousands of Mets fans celebrated the former franchise star. The reception eventually became so loud that Alonso emerged from the Orioles dugout for a curtain call.
It was an extraordinary scene involving a player who spent the first portion of his career becoming synonymous with the Mets.
Pete Alonso Receives Emotional Citi Field Reception
Alonso stepped to the plate with Baltimore trailing 3-2 in the top of the ninth inning.
He took two pitches out of the zone from Mets pitcher Kodai Senga before sending the next pitch over the fence to tie the game.
Career home run No. 300 had arrived.
And it happened against the organization Alonso represented for years.
The Citi Field crowd quickly recognized the significance of the moment. Fans stood and applauded Alonso even though his home run had just cost their own team the lead.
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Eventually, Alonso returned from Baltimore’s dugout and acknowledged the crowd.
The Orioles went on to win the game 7-5 in 11 innings.
History For Polar Bear Pete
Alonso’s milestone also placed him in impressive historical company.
He reached 300 career home runs during his eighth MLB season. According to MLB.com, only Ralph Kiner and Albert Pujols hit more home runs during their first eight major league seasons.
That statistic helps explain how quickly Alonso has established himself among the most prolific power hitters of his generation.
Still, the location of No. 300 is what will make the moment so memorable.
Alonso became a star with the Mets. He won the Home Run Derby twice while representing New York and established himself as one of the most popular players in the organization.
Now playing for Baltimore, Alonso returned to Citi Field and reached one of baseball’s most recognizable milestones against his former team.
The Mets fans in attendance did not seem interested in pretending the history didn’t matter.
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For at least a few minutes Tuesday night, Alonso belonged to New York again.
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This story was originally published September 16, 2026 at 6:07 AM.