Backed by the combination of strong starting pitching and enough offense to support it, the Red Sox finished off a sweep of the Cleveland Indians, 6-3, stretching their winning streak to six straight in the process. Jon Lester improved to 3-0 as he went seven innings and allowed two earned runs on just four hits. His ERA for the season is 1.73. Leading 3-1 in the seventh, the Sox tacked on three more runs against the Cleveland bullpen. Mike Napoli singled home one run, Daniel Nava -- who had singled in the first Sox run in the second -- delivered another with a sacrifice fly and pinch-hitter Mike Carp knocked in the third with a single. Jarrod Saltalamacchia had homered (No. 3) in the fourth. The Indians nicked Lester for solo runs in the second and fifth, but the lefty retired eight of the final nine hitters he faced. After Cleveland got a run off Koji Uehara -- charged to Andrew Miller -- Andrew Bailey got the final three outs for his second save in as many nights.