Pete Alonso hit his 300th career home run Tuesday night, and he hit it in the ninth inning at Citi Field, in an Orioles uniform, off the team that made him. The ballpark that watched him grow up gave him a curtain call anyway. Then Baltimore won it 7-5 in 11 innings on a Coby Mayo inside-the-park homer, which is the kind of sentence you only get to write a few times a decade.

That is a whole lot of baseball in one night. Let's take it in order.

What happened when Pete Alonso hit his 300th home run

The swing came in the ninth with the Mets in front, and it tied the game. Not a garbage-time milestone, not a cushion shot in a blowout. A tying home run, in the ninth, in the building where he spent the years that made his name, against the club that drafted and developed him.

And the crowd called him back out. Think about the mechanics of that for a second: those fans had just watched their own lead disappear, and they still stood there and made noise until he came out of the visiting dugout to tip his cap. New York does not hand those out to the opposition. Tuesday it did, because history got in the way of loyalty.

checked the almanac: alonso hit 53 home runs as a rookie in 2019, breaking aaron judge's 52 from two years earlier, and queens has been calling him out of the dugout for curtain calls ever since. tuesday's just came from the wrong bench.

Coby Mayo's inside-the-park homer in the 11th

The part that actually decided the ballgame belongs to Mayo, who in the 11th inning turned a batted ball into four bases without it leaving the yard. Inside-the-park home runs are a collision of things going wrong for the defense and one guy refusing to stop running. They are not a strategy. They are an accident with a hero in it.

So Baltimore leaves Citi Field with a 7-5 win built on a milestone from a man who used to live there and a trip around the bases from a young player who is still figuring out what his career looks like. Two very different résumé lines, same box score.

Baltimore Orioles injury news: Shane Baz hit by a line drive

The night was not all fun. Baz did not finish his start: he took a Bo Bichette line drive off the right arm at 105.1 mph and came out of the game. I don't have the imaging or a timeline in front of me, so I'm not going to guess at one. I'll just say what anyone who has watched a pitcher wear a comebacker knows, which is that 105 off the bat from 55 feet is not a fair fight, and the immediate concern is the arm, not the inning.

That's the honest shape of it. A milestone, a freak play, and a pitcher walking off the mound holding his forearm, all inside the same three-plus hours.

What comes next for the Orioles and Mets

They run it back at Citi Field on Wednesday at 7:11 PM ET, the third act of a series that has already produced a 300th home run, a curtain call, and an inside-the-park walk-off winner in extras. September does this. The calendar tightens, the races get loud, and the baseball starts handing out things you have to see to believe.

What I'm watching next is simple and human: word on Baz's arm, and whether Alonso gets one more trip up those Citi Field steps before this series is over.