Joe Smith Jr. could be headlining a new Long Island fight venue soon. Photo by: Premier Boxing Champions

When Showtime boxing chief Stephen Espinoza joked at a recent press conference that Barclays Center CEO Brett Yormark was relentlessly calling him in search of fight dates, he wasn’t kidding.

Barclays Center is discussing the possibility of having four more cards to end the year: July 30 (Leo Santa Cruz-Carl Frampton on Showtime) and then workable dates on Sept. 24, Dec. 10 and Dec. 17, Yormark told RingTV.com.

But beyond that, Yormark, who considers boxing the third franchise at Barclays Center after the Nets and Islanders, is planning a massive expansion of that franchise with up to five venues under his influence in New York in the years to come for boxing.

In a remarkable show of support for the sport, Yormark envisions monthly cards spread between Barclays Center, Nassau Coliseum in Uniondale, Long Island, an open-air venue in Coney Island, Brooklyn, a smallish location in downtown Brooklyn, and a new spot in Manhattan that has yet to be finalized, all of which he will have access to. While the venues obviously won’t be exclusive to boxing, the sport will be a large component to all of them.

“We’re starting to see the fruits of our labor — creating continuity within our boxing program,” Yormark said. “This is all part of the strategic vision for the future.”

For an ambitious dealmaker such as Yormark, it’s a bold concept. Early on, the fear was that Yormark might sour on the sweet science after he was unable to land a fight with Floyd Mayweather Jr. after repeated tries. He was a bystander to the friction between Oscar De La Hoya and Richard Schaefer after signing a deal with Golden Boy in 2010 to be the exclusive promoter to Barclays Center when it first opened.

Instead, Yormark regrouped, aligning himself with Showtime’s Espinoza, Al Haymon and promoter Lou DiBella, among others, and is expecting a busy future. Espinoza is a close ally — he is on the advisory board for the Barclays Center, which has a say in the decision making for all the various properties associated with it. And there are many.

There is an alliance with the Ford Amphitheater at Coney Island Boardwalk, a gleaming new open-air- roofed venue that holds 5,100 and will serve as a seasonal hub for boxing. Errol Spence Jr. is expected to christen the first boxing show on Aug. 21 against Leonard Bundu after Spence demolished former titleholder Chris Algieri at Barclays Center in April.

Then, there is the Nassau Coliseum, which is undergoing a renovation and is controlled by Brooklyn Sports & Entertainment, the same company that operates the Brooklyn Nets, New York Islanders and Barclays Center. Yormark, who is also the CEO of Brooklyn Sports & Entertainment, envisions a scenario in which Nassau Coliseum, which will be able to flex up to 14,500 seats, and Barclays Center will alternate between hosting monthly cards.

Joe Smith Jr., who recently shocked Andrzej Fonfara in one round and is from Long Island, as well as Huntington’s Algieri and even Errol Spence, who was born in Long Island, are already being discussed as possible headliners to kick off the first Nassau Coliseum show sometime in April, Yormark said. “Joe was here on Saturday night (for Thurman-Porter) and he would love to open that building,” Yormark said. “There’s a lot of possibilities.”

The company is also in the process of finalizing a deal for a venue in Manhattan that will also serve as a feeder system for the larger shows at Barclays Center and Nassau Coliseum. DiBella plans to move his “Broadway Boxing” franchise there when it opens to accommodate a larger crowd than what BB Kings can provide. “If we can extend our footprint into Manhattan with a venue that has a purpose and has a meaning, then it would be great,” said Yormark.

Brooklyn Sports & Entertainment also recently signed a 49-year lease at the LIU Brooklyn Paramount Theatre in downtown Brooklyn that will be able to hold smaller shows, scaled for around 2,800 fans.

The Brooklyn-born DiBella is licking his chops at the all the venues he will likely have access to. “For me, being a Brooklyn kid who lives on Long Island, it’s friggin’ great,” he said. “To be able to establish a major venue in Long Island is a thrilling prospect. To have a small venue in Brooklyn and a small venue in Manhattan is thrilling. I’m really excited with the stuff that Brett and his team are doing. They’ve made a real commitment to boxing.”