Walter J. HaasWalter J. Haas is an American businessman and former president of the Oakland Athletics and co-chairman of the Evelyn and Walter Haas Jr. Fund.BiographyHaas was born the son of Evelyn (née Danzig) and Walter A. Haas Jr. He has two siblings: Robert D. Haas; and Betsy Haas Eisenhardt.Personal lifeHaas married Julie Salles, a Roman Catholic, in a Unitarian ceremony in Sausalito, California. They have three children: Simone Haas Zumsteg, Charlotte Haas Prime, and Walter A. Haas III.