One of Bobby Valentine's first acts as Red Sox manager was to visit David Ortiz in the Dominican Republic and let him know how important it was to keep him on the team. Now everybody is seeing that. Ortiz, a free agent in the offseason, is off to one of the best starts of his career. On Sunday, the slugging designated hitter doubled in the go-ahead run for his seventh consecutive hit and Boston won its third straight game over the Tampa Bay Rays, 6-4.