The Red Sox announced this afternoon that former Braves GM Frank Wren has been hired as the team’s senior vice president of baseball operations. Wren, 57, worked with president of baseball operations Dave Dombrowski previously in the Marlins and Expos organizations. He will add to the team’s new-look front office, which also features newly appointed general manager Mike Hazen, who was promoted yesterday after previously serving as the team’s assistant GM.