Fedor Emelianenko has signed a promotional contract with Strikeforce, delivering one of the top pound-for-pound fighters to a company that is quickly raising its profile in the mixed martial arts industry. The Russian heavyweight became a free agent when the Affliction promotion collapsed following the failed drug test of Josh Barnett, who was supposed to face Emelianenko in the main event of a card last Saturday at the Honda Center in Anaheim, Calif.