Bobby Valentine will become the new manager of the Red Sox, sources close to the situation said Tuesday night. Valentine, who has been in Japan on personal business and was offered the Red Sox job there, was scheduled to board a flight at around noon Wednesday in Tokyo (Tuesday night at midnight ET) and be in back in Boston by midafternoon. He was one of two finalists for the job, the other being Gene Lamont, currently serving as third-base coach for the Tigers.