LAS VEGAS -- Roy Jones Jr.'s reign as a heavyweight champion is about to come to a close.

Jones has scheduled a news conference for Saturday to announce a fight Nov. 8 with Antonio Tarver, who holds two light heavyweight title belts Jones used to own.

Taking the fight means Jones probably will lose the WBA title he won in March from John Ruiz in his only fight as a heavyweight. The WBA has scheduled a purse bid for Sept. 15 for David Tua and Hasim Rahman to box for what it labels an interim title fight.

Tarver (21-1, 17 KOs) won the bronze medal in the 1996 Olympics and beat Montell Griffin in April to win the WBC and IBF 175-pound titles vacated by Jones when he moved up to the heavyweight division.