Mario Soto, once one of baseball's top right-handed pitchers, said Saturday that his big league career is over because of an ailing shoulder. Soto, 32, said previously he was "convinced" that he could return to the majors, and had contract discussions with Dodgers management. The pitcher was released by the Cincinnati Reds last June. The Dodgers, gambling that his shoulder problem would clear up, signed Soto as a free agent and put him on the disabled list.