PITTSBURGH (AP) — Kutter Crawford allowed one run in six strong innings and the Boston Red Sox defeated the struggling Pittsburgh Pirates 4-2. Crawford struck out six and walked three. The 28-year-old right-hander gave up a season-high seven hits after not allowing more than three hits in any of his previous four starts. Boston entered the series having lost seven of 10 games before taking the first two of the three-game set. Pittsburgh lost its fifth straight game after opening the season 11-5. Kenley Jansen picked up his fifth save, striking out the side in the ninth. Pirates ace Mitch Keller (2-2) was tagged for four runs and allowed five hits and four walks in six innings.