The Ivy League-educated former head of New York Mets ticket sales sued the club Wednesday, saying she was fired last month after insults and humiliation were hurled at her by the club owner's son, a top team executive who she claimed was upset that she had a child without being married.

Leigh Castergine's Brooklyn federal court lawsuit named Sterling Mets Front Office LLC and Jeffrey Wilpon, the club's chief operating officer, as defendants. It sought unspecified damages and asked that the Mets be stopped from future discrimination.

The lawsuit said the club recognized and rewarded Castergine after she was hired in December 2010 as vice president of ticket sales and service to modernize the Mets ticket sales until she learned she was pregnant in August 2013.

According to the lawsuit, Wilpon "became fixated on the idea that Castergine would have a child without being married. He frequently humiliated Castergine in front of others by, among other insults, pretending to see if she had an engagement ring on her finger and openly stating in a meeting of the team's all-male senior executives that he is "morally opposed" to Castergine "having this baby without being married,'" the lawsuit alleged. It added that no one, including the team's general counsel, challenged Wilpon's statement.

The lawsuit said Wilpon also told Castergine, a University of Pennsylvania graduate, that she would make more money and get a bigger bonus once she was married. Then, it said, he told her "something had changed" after the birth of her child and that she was no longer as "aggressive" as she used to be.

After she complained to the team's human resources department, she was fired on Aug. 26, the lawsuit claimed.

In a statement, the Mets said, "We have received and reviewed the complaint. The claims are without merit. Our organization maintains strong policies against any and all forms of discrimination."

In the lawsuit, Castergine's lawyers described how the one-time $6-an-hour ticket agent for the Philadelphia 76ers gained experience in more senior jobs with the Philadelphia Flyers, Orlando Magic and the Boston Bruins before joining the Mets organization.

The court papers said she introduced major pricing changes, new benefits and a flexible exchange policy for season ticket holders, earning two $50,000 raises, annual six-figure bonuses and a promotion to senior vice president. One industry publication even described her as "the next female president in the sports industry," the lawsuit said.

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AP Baseball Writer Ben Walker contributed to this report.