Richard Jefferson calls it quits ... is YES gig next?

Richard Jefferson, the last active player from the New Jersey Nets two Finals teams, has announced he’s retiring from the NBA. Now, according to numerous sources, he will move from the court to the booth and studio, working games for both the YES Network and ESPN this season.

Jefferson, 38, disclosed that he’s finally leaving the court in an Instagram post Saturday that also celebrated the life of his late father, “Big Rich” who was killed in a drive-by shooting three weeks ago in Compton, California...

Jefferson played seven years with the Nets, including the two Finals teams in 2002 and 2003. He averaged 17.4 points and 5.4 rebounds over the course of his Nets career. His best season was…