Electronic Arts today announced that it has replaced Larry Probst as its chief executive officer, naming former EA executive John Riccitiello as the new leader of the world's largest video game publisher. Riccitiello, who will become CEO April 2, joined Redwood City, Calif.-based EA in October 1997, rising to president and chief operating officer before quitting in April 2004. Probst will remain as executive chairman of EA's board of directors.