Claim: Big Boi has been a member of Outkast since 1992.
Evidence: Antwan André Patton -LRB- born February 1 , 1975 -RRB- , better known by his stage name Big Boi , is an American rapper , songwriter , actor and record producer , best known for being a member of American hip hop duo Outkast alongside André 3000.
Benjamin and Patton formed the group as high school students in 1991.