Pete Alonso hits career 300th home run at Citi Field, Orioles beat Mets 7-5

Pete Alonso hit his 300th career home run at his old ballpark, earning a rare road curtain call from the Mets crowd.

Pete Alonso returned to Citi Field on Tuesday night and delivered one of the more emotionally charged moments of the MLB season — a milestone home run against the very franchise where he built his legacy. Alonso, now a first baseman for the Baltimore Orioles after signing with them last December, launched his 300th career home run off Mets pitcher Kodai Senga in the ninth inning, tying the game at 3-3. Alonso spent the entirety of his previous career with the Mets, where he set the franchise record with 264 home runs. His departure last offseason made Tuesday's visit to Queens loaded with history from the moment he stepped onto the field. The 300th homer added a layer of narrative that even a scripted Hollywood ending could not have improved upon. After connecting on the milestone shot, Alonso fired his bat toward the Baltimore dugout and shouted in excitement as he rounded the bases. The Queens crowd of 28,097 — Mets fans watching their former beloved slugger hurt them — responded by calling him back out of the dugout for a rare curtain call on the road, a tribute that typically only happens in a player's home ballpark. The drama did not end in the ninth. Baltimore's Coby Mayo delivered an inside-the-park home run in the 11th inning to ultimately push the Orioles to a 7-5 victory, a result that carried added weight for Baltimore, which is clinging to playoff hopes late in the season. Following the game, Alonso added a personal touch to an already memorable evening. He met with the three fans who had caught his historic ball, sharing the moment with them directly after the final out. The milestone places Alonso among the game's most productive power hitters. Reaching 300 career home runs is a benchmark that has historically been associated with long-term greatness, and Alonso accomplished it before his 30th birthday. For Mets fans, the night was a bittersweet reminder of what the team lost in free agency — a homegrown slugger taking his biggest individual moment not in orange and blue, but against it.

Why it matters

Alonso's 300th home run, hit at the park where he set the franchise record, underscores the significance of last winter's free-agent departure and keeps Baltimore's fading playoff hopes alive. The milestone also cements Alonso's standing as one of the game's premier power hitters while still in his prime.

What's next

The Orioles, clinging to playoff hopes, continue their series against the Mets at Citi Field.

Key facts

Bias & framing notes

The AP-sourced report (republished across multiple outlets) provided the most complete and consistent factual account. The Yahoo/ClutchPoints source introduced one notable error, calling Alonso a Baltimore Orioles 'first baseman' in the opening but then framing the story as 'Mets news,' which created a slightly muddled framing around his current team affiliation. All sources agreed on the core facts: the milestone, the score, and the curtain call.

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