The transition of sleepy, clubby pro sports to Wall Street business with flowing money, byzantine lawsuits, high stakes and even higher-faluting debates of loyalty officially hits Cincinnati today. All-Pro middle linebacker Bill Bergey, one of the Bengals’ franchise players, appears at a press conference in Norfolk, Va., to announce he’s signed a three-year deal with something called the Washington Admirals of the new World Football League that takes hold in 1976 and is said to be worth the unfathomable price of $250,000. But Bengals founder and head coach Paul Brown, fearing a raid of his six-year-old expansion team that is already coming off its second division title, is furious and has already beaten Bergey to the punch.