Yankees All-Star relief pitcher Dellin Betances grew up on the Lower East Side of Manhattan and pitched for Grand Street Campus in Brooklyn. He was an All-American and an eighth-round draft pick of the Yankees in 2006. The 6-foot-8 right-hander details what it was like growing up as a star athlete in the city, as told to The Post’s Zach Braziller.

For me, it was a lot of fun obviously to grow up here. Playing with some of the guys that I grew up with, guys that I played summer ball with. The Martinez brothers [Melvin and Steve] at Grand Street Campus ran a great program. They still do to this day.

It was a great four years there. For basketball, I enjoyed it as well. I played a couple of years there. We were able to win a division title my sophomore year. It was a lot of fun. I stopped playing basketball after that.

We were playing Midwood High School and a guy went up for a shot and elbowed me in my mouth, and my front tooth I remember falling out. My jersey was all bloody. I had to get rushed to the hospital. They were able to save my tooth, but then after that, I had a lot of people in my ear about not playing basketball anymore and I ended up just concentrating on baseball.

It was a tough decision. Even till this day, I go back and think, ‘Man, I should’ve played.’ But it worked out for me. Baseball has definitely worked out. The Martinez brothers ran a great program. We always worked out pretty hard. Obviously, they try to do the best they can to form a tight-knit group. Pretty much like a family. They do a great job of getting guys ready for either the pro level or college.

I would probably say I started getting noticed going into my junior year. I was throwing a little harder, and you always would see scouts there. I remember going to this Perfect Game event in Fort Myers [Fla.]. I did a really good showcase and it went well. After that, I started getting a lot of letters from different schools and different pro teams. At that point, I was like, ‘Man, this is real.’

It was crazy. It was surreal. There were posters everywhere throughout the school, everybody just coming out for the games every time I was pitching. Going to different schools and everybody is just packing the stands just to see me pitch, see me play. It was pretty cool.

There were a lot of great memories. I’ll probably say one of them was when I struck out 20 guys in seven innings against John Adams. I think I gave up one hit. I struck out everybody but two guys. That’s probably one of my top pitching moments. I remember I had a perfect game through five. There was a ground ball to first and it went between my first baseman’s legs. It was an error. The hit I gave up, our coach was pretty much playing everybody to swing late, so the third baseman was shifted over to his left and the guy hit a ground ball down the line. He got a double out of it.

When I got drafted, I remember being in my summer ball coach Mel Zitter’s house, kind of following the draft online. I had seen a bunch of guys that I played against and played with getting picked and I got picked in the eighth round. The pick before me was a guy [Rafael Cabreja] I actually played summer ball with. So I was excited for him. I was like, ‘Oh look, he got drafted by Boston. Cool.’ I knew how much he loved Manny Ramirez; it was a perfect situation for him. The next pick was me, but I was so happy for him I kind of missed it until my brother told me. I was like, ‘Wait, no way.’ We were jumping up and down out of excitement.

For me, I loved playing baseball; I loved traveling; I loved the kids I grew up with. Obviously, I played in great programs, with Youth Service, which was a great summer ball program, and my high school ran a great program. I was fortunate enough to play for two really good coaches.