BOSTON — Even before left-hander Jake Bennett began to struggle after the All-Star break, the Boston Red Sox planned on an extended break for the rookie.Entering Sunday, in his first big-league season, Bennett had posted 120 innings between Triple-A Worcester and the majors. That his numbers had slipped from a 2.35 ERA through his first nine starts to a 5.67 ERA in his last five further indicated he could use a bit of a reprieve.So, the Red Sox skipped Bennett, giving him eight days of rest between starts. Sunday, he came out in the first inning against the San Francisco Giants and labored through 23 pitches, allowing two runs. He then gave up a solo homer to open the third, raising momentary concern that rookie fatigue was not the main issue. He hadn’t given up a run in the first inning in his first 14 starts.Then, Bennett locked in.The 25-year-old pitched four more innings, allowing just one more unearned run thanks to shoddy defense in the seventh. Boston’s offense battled from behind once again to win 5-4 in a sweep of the Giants.It marked Boston’s 10th series sweep of the season.“Huge,” interim manager Chad Tracy said of Bennett’s outing. “That’s important to see him settle in and not just go five but end up going seven (innings). So, a gutsy outing. I thought it was really, really good.”Ceddanne Rafaela helped Bennett avoid further damage in the first with a terrific head-first diving catch to end the inning. After Jonah Cox’s solo homer to open the second, putting the Giants up 3-0, Bennett started mixing in his cutter and two-seamer more, knocking the Giants out of sync. After 23 pitches in the first, he needed just 23 pitches combined for the next three innings.