Lawyers for the Mets’ owners threw a brush-back pitch today at the bankruptcy court trustee who sued them for $300 million-plus for alleging illegally profiting from Bernie Madoff’s massive Ponzi scheme.

The papers, filed on behalf of Fred Wilpon and Saul Katz in US Bankruptcy Court, demand that Irving Picard turn over all discovery material so all sides will be on an even playing field.

The two sides agreed to mediation, which has already begun and is being overseen by former governor Mario Cuomo.

But “meaningful mediation will be impossible if the . . . defendants do not have access to all of the Trustee’s pre-complaint discovery,” the filing states.

The lawsuit, which claimed the Mets “knew or should have known” that Madoff was running a scam, was unsealed earlier this month.