Princeton Bailey went viral mimicking José Alvarado's every move in the Philadelphia Phillies' win on Tuesday night against the Washington Nationals.

While Alvarado pitched a scoreless eighth inning to help the Phillies in their 7-6 victory over Washington, Bailey was captured on the broadcast copying the pitcher's movements, imagining he, too, was on the mound.

"I did the same move," Bailey said.

Then, both Bailey and Alvarado celebrated getting out of the inning alive.

Princeton's grandfather, Troy Bailey, bought the tickets for Princeton's 12th birthday, and it was a game they will never forget. 

"I wanted to get some good seats, you know what I mean, for him, instead of sitting way up," Troy Bailey said. "He brought his glove. He was ready to catch a fly ball." 

In the process, Princeton Bailey caught the attention of every Phillies fan as the video went viral. 

"What are the odds of this happening?" Troy Bailey said. "I tried to tell him, but he said, 'Pop-pop, I'll see it in the morning. I'm sleepy.'" 

Troy Bailey says a woman in front of him turned around and told him her family spotted them all on TV. 

"I am thinking it was the big jumbotron in the stadium, but it was actually a TV," Troy Bailey said. "By the time we got home, it just blew up." 

Then, in the bottom of the ninth inning, Bryson Stott scored on a wild pitch to win the game. 

It was the perfect birthday gift. 

"He said, coming home, 'Pop-pop, did I help them win?' I said, 'Yeah, you helped him win, buddy,'" Troy Bailey said. 

Troy Bailey said the Phillies reached out to the family, and they are excited to see what the future holds.

"He gave me a baseball": Phillies fan meets Alvarado after going viral 

"All he does is mimic the players that he see. That's all he does, and he's getting good at it," said Troy Bailey.

Days later, Princeton was on the field at batting practice, meeting the man he looked up to.

Winning is one thing, but these special moments are what baseball is all about. José Alvarado gave Princeton a few gifts, including a necklace, jersey and hat with special messages.

"Just sharing some knowledge there and telling him to never give up. We never give up here in the big leagues," said Alvarado through a translator.

The Bailey family said this was a once-in-a-lifetime experience. Alvarado said seeing the video was special.

"It was something amazing, and it was really surprising to see that little kid just doing like I was during the game," he said.

While Troy Bailey originally got the tickets for Princeton's birthday, this gift is now going down in family history. The family said they received so much love and support.

And that small gesture from Alvarado and the Phillies meant the world.

"Just that joy. All the comments we seen online. It brought tears to our eyes. He's a shy guy. I want him to develop and know how to talk and overcome that and I think this is the perfect opportunity to do that," said Troy Bailey.