Retired NFL player Matt Birk claims Chris Kluwe and Brendon Ayanbadejo are “against traditional marriage.”

Kluwe and Ayanbadejo are the NFL's most outspoken supporters of marriage equality, while Birk, who announced his retirement in February, is the league's most outspoken opponent.

Thirty-one year old Kluwe, a punter for the Oakland Raiders, and his wife Isabel are raising two daughters. Ayanbadejo, 36, a former member of the Baltimore Ravens, is raising a son and a daughter with his wife.

Appearing this week on FRC radio, Birk said that both football players were opposed to “traditional marriage.”

“With the Ravens, we had one person who was really outspoken, was really against traditional marriage. And he got a lot of headlines,” Birk told Washington Watch host Tony Perkins. “And one of my former teammates on the Vikings was the same way. And they got a lot of press. But actually the Baltimore Ravens, we had six guys sign a statement that said we unequivocally believe that marriage is defined as one man and one woman.”

(Related: Matt Birk claims gay marriage would strip rights from Christians.)