Alex Rodriguez says he’s finished with the hearings. (Seth Wenig / AP)

Alex Rodriguez stomped out of his own grievance hearing Wednesday, furious that arbitrator Fredric Horowitz had ruled that Commissioner Bud Selig did not have to testify.

According to ESPN, Rodriguez slammed his hand on a table during the hearing at at Major League Baseball’s Park Avenue office and cursed Rob Manfred, baseball’s chief operating officer. “This is ridiculous,” he shouted, according to ESPN, shortly before noon. He pointed at Manfred and said, “You know you’re full of [expletive]!”

The hearing, in its 12th day, concerns a grievance filed by the Major League Baseball Players Association after A-Rod was suspended 211 games by baseball last summer because of alleged violations of the drug agreement and CBA.

“I am disgusted with this abusive process, designed to ensure that the player fails,” Rodriguez said in a statement. “I have sat through 10 days of testimony by felons and liars, sitting quietly through every minute, trying to respect the league and the process. This morning, after Bud Selig refused to come in and testify about his rationale for the unprecedented and totally baseless punishment he hit me with, the arbitrator selected by MLB and the Players Association refused to order Selig to come in and face me.

“The absurdity and injustice just became too much. I walked out and will not participate any further in this farce.”

A-Rod’s walk-off means that the whole process may be headed to court, although his lead attorney, Joseph Tacopina, was not available for comment. “We don’t know what we’re going to do,” A-Rod’s spokesman told ESPN. “The fight’s still going on, but most likely it’s going to end up in federal court.”