ST. PETERSURG, Russia — Pole vault great Sergei Bubka of Ukraine is expected to be the sixth declared candidate in the race to become the next International Olympic Committee president. The 49-year-old former Olympic and world champion has scheduled a news conference. Bubka is expected to be the final candidate to nominate, completing a record six-man field, for the Sept. 10 election in Buenos Aires. The field already includes IOC vice presidents Thomas Bach of Germany and Ng Ser Miang of Singapore, finance commission chairman Richard Carrion of Puerto Rico, amateur boxing association chief C.K. Wu of Taiwan, and international rowing federation head Denis Oswald of Switzerland. — AP