7:00 AM ET

NEW YORK — Adam Ottavino never expected The Lab to turn into this.

The New York Mets reliever just wanted a place in the city to throw in the offseason, something that can be hard to find here in the winter months. Heading into the 2018 season, Ottavino — then with the Colorado Rockies — converted what used to be a Nine West shoe store underneath an abandoned Chuck E. Cheese on St. Nicholas Ave. in Harlem into an advanced pitching facility, decked out with cameras that measure pitch spin rates and iPads that provide pitchers with instant feedback.

“We were just trying to make the most of the situation,” Ottavino said.

Ottavino — who grew up in Park Slope, Brooklyn — rented the retail space from his father-in-law hoping to find a temporary place to throw his bullpens after dropping off his two daughters at school. Five years later, The Lab welcomes everyone from college pitchers to minor leaguers to amateurs from New York’s men’s leagues, right on up to Ottavino’s fellow big leaguers — free agent hurler Matt Harvey, Chicago Cubs starter Jameson Taillon and Yankees reliever Michael King are among those who have made appearances.

“It wasn’t meant to be this way,” Ottavino said. “But I started realizing this was gonna be about more than me. It was gonna be about the whole New York City baseball community. Trying to be a resource for guys.”

To take The Lab to the next level this offseason, Ottavino hired staff to help run the facility for the first time, bringing in Gerardo Roque and Jason Pastuizaca — who both work in the Mets clubhouse. The space now resembles a baseball museum, curated by Ottavino, with autographed baseballs he’s collected throughout his career, including legends like Lou Brock, Ichiro Suzuki and Whitey Ford. There are autographed jerseys of some of Ottavino’s teammates over the years, including Scherzer, Jacob deGrom and Nolan Arenado.

That opportunity to get better with access to a lot of data is what appealed to Taillon, who is adding a sweeping slider to his pitch repertoire this offseason while finishing out his lease in New York after two seasons with the Yankees. The Trackman data has allowed Taillon to work on his release point and get instant feedback on how the ball is coming out of his hand.

“Plus, Otto is just a walking baseball encyclopedia,” Taillon said. “He’s probably better than 99% of pitching coaches in the league.”

For Ottavino, The Lab turned into the manifestation of a childhood dream, a place to create a community around the art and science of pitching.

“I know that if I were a younger guy and I had an opportunity to watch some major leaguers grow and talk to them and pick their brains, I would have loved that as a kid,” Ottavino said. “That would’ve carried me a long way into working hard every day towards my dream.”

Ottavino never expected that dream to come true in an unmarked Harlem storefront, but where The Lab is located doesn’t matter.

“You could put us in the middle of a freaking desert,” Taillon said, “but if we have this information and have this camaraderie, conversation, we’ll find a way to meet.”