Two weeks ago the Red Sox defended their decision to recall Will Middlebrooks by insisting he had made enough improvements during a six-week demotion. Still the burden of proof was on Middlebrooks. Well making his 11th consecutive start here today after returning from Triple A Middlebrooks belted a two-run homer in the second inning that started the Red Sox on their way to a 12-1 rout of the Giants in the finale of a three-game interleague series. It was a continuation of an impressive run in which the 24-year-old third baseman has gone 15-for-34 (.441) with two homers seven RBI and a .706 slugging percentage. Middlebrooks kickstarted a 12-hit offensive outburst that also featured three hits from both Jacoby Ellsbury and Shane Victorino two-run singles by both Jonny Gomes and Jarrod Saltalamacchia and a three-run homer by Stephen Drew. The Red Sox led 6-1 after four innings then tacked on five runs in the seventh before emptying their bench and giving a welcome rest to Dustin Pedroia banged-up right fielder Shane Victorino and David Ortiz who left in the fifth inning with low back tightness. Ortiz’ departure raises some concern for the Red Sox who continued their six-game interleague trip on Friday night in Los Angeles. Ortiz started two of three games at first base against the Giants and according to manager John Farrell the plan was to use him at first base in at least two games against the Dodgers too. “David’s been our most productive hitter” Farrell said before the game explaining why Ortiz started at first base instead of righty-hitting Mike Napoli against Giants lefty Barry Zito. “Getting David back on the field in the middle of our lineup (against) right-handed left-handed (starters) to me it doesn’t matter.” While the Red Sox teed off against Zito and won their first series since Aug. 5-7 in Houston lefty starter Felix Doubront barely broke a sweat against the stripped-down Giants who are a shell of the team that won the World Series last year. Doubront gave up five hits over eight innings including only three hits after the second inning. The lone run against him came on Joaquin Arias’ solo homer in the second inning as Doubront bounced back after allowing seven runs in four innings last Friday night against the Yankees at Fenway Park.