NFL history...

when NFL merged with AFL,in 1970,the league offered $3 million to any team to switch conferences,from the NFC to the AFC,to balance out the conferences... the Steelers,Browns,and the Colts,whose owner(Carroll Rosenbloom)would not pass up a payout like that... Rosenbloom,and the Irsay Family LATER switched team ownership,when Rosenbloom wanted the Rams,and Irsay took the Colts... Steelers and the Browns were joined at the hip,because neither team would switch conferences,without the other...