Oakland Raiders punter Chris Kluwe believes the Defense of Marriage Act (DOMA) contributes to a dysfunctional society.

The 31-year-old Kluwe is among the NFL's most outspoken supporters of gay rights. Last year, when he was with the Minnesota Vikings, Kluwe campaigned against passage of an unsuccessful amendment to the Minnesota Constitution which sought to define marriage as a heterosexual union. This year, he spoke out in support of Minnesota's gay marriage law, which takes effect on August 1.

In a HuffPost Live appearance to promote his book Beautifully Unique Sparkleponies, Kluwe took aim at DOMA, which prevents federal agencies from recognizing the legal marriages of gay and lesbian couples.

“It's always about a group of people trying to control another group of people and telling them how to live their life,” Kluwe said. “That is not the basis of a functional society.” (The video is embedded on this page. Visit our video library for more videos.)

The Supreme Court is expected on Wednesday to hand down a ruling on DOMA.