Portola Pharmaceuticals has appointed John B. Moriarty, J.D., as executive vice president and general counsel, effective immediately.    Mr. Moriarty will report to William Lis, chief executive officer, and will serve as Portola’s chief legal officer, responsible for leading all legal, regulatory, governance and compliance initiatives. He also will be directly involved in strategic business transactions and corporate expansion as a member of Portola’s Executive Committee.   “John...