The New York Mets made it official, hiring Luis Rojas as their manager to replace Carlos Beltrán. New York made the announcement a week after Beltrán departed without managing a game. Rojas, who had been the Mets' quality control coach, was given a multiyear contract. Rojas became New York's fourth manager in the past 2 1/2 years — and third in four months. He is to be introduced Friday at a Citi Field news conference. Beltrán was let go last week as part of the fallout from the Houston Astros' sign-stealing scandal.