Minnesota Vikings punter Chris Kluwe has said reaction to his gay marriage advocacy has been mostly positive.

Kluwe last year came out against an unsuccessful attempt to define marriage as a heterosexual union in the Minnesota Constitution.

In an interview with Sports Illustrated's Extra Mustard blog, Kluwe was asked how he became involved in the issue.

“I was asked on Twitter by a group to help out with the Minnesota marriage amendment and I said yeah, that seems like the right thing to do,” Kluwe answered. “I was going to do a couple radio ads and then a dinner thing, and then Delegate [Emmett C.] Burns wrote his letter to the Ravens and I wrote my response.”

(Related: Chris Kluwe goes after lawmaker attacking Brendon Ayanbadejo over gay marriage.)

Kluwe added that he had not received much backlash over his advocacy on the issue.

“Not really. Just kind of a couple of Twitter or Internet messages, like, 'Hey, shut up your mouth fag.' Stuff like that. But that's the Internet. It happens. The amount of support has been far more overwhelming than the negative messages,” Kluwe said.

(Related: Chris Kluwe, Brendon Ayanbadejo file brief in support of gay marriage.)