The Giants, John Mara admits, are “in a little bit of an unusual position” as the league comes to grips with a new formula for revenue sharing.

Of course, the Giants play in a big market but, in terms of revenue, they are in the bottom half of the NFL. What’s good for the Giants today might not be good for them in the near future.

As part of the six-year extension to the collective bargaining agreement signed off on Wednesday night, the bottom 17 teams in terms of revenue will receive money from the top 15 revenue-generating teams to help offset rising salaries. The Giants are 20th in the 32-team league.

“Over the next four years, we’re in the bottom half of the league revenue-wise and we’ll be the recipient of some of that revenue sharing,” Mara, the Giants chief operating officer, told The Post yesterday. “But ultimately, when we get a stadium done, if we ever get it done, we’re going to move into the haves as opposed to the have-nots. At the end of the day, you have to try to make a decision that’s in the best interests of the league as a whole.”

What Mara liked best about an agreement he called “very expensive” is that when it came to crunch time, selflessness among the owners paved the way for labor peace with the NFL Players Association through the 2011 season. Mara learned that trait from his father, Wellington, who died on Oct. 25 as the patriarch of the Giants and a man always known for his league-first thinking.

The legacy left behind by his father was felt when John Mara walked into the room for what he called “the most important league meeting in my memory.” It was not a burden, though.

“You do feel obligated to try to make a decision that’s in the best interest of the league,” Mara said.

Although others credited him for his role in brokering a deal, Mara praised four men – Jonathan Kraft (son of Patriots owner Robert Kraft), Jets owner Woody Johnson, Steelers president Art Rooney and Ravens president Dick Cass – as being “the critical people” in bringing the process to a conclusion.