BOSTON — Chris Sale remained winless in six starts this season, giving up Daniel Robertson’s two-run homer in the first inning and Yandy Diaz’s two-run triple in the second as the Boston Red Sox lost to the Tampa Bay Rays 5-2 Sunday. Sale (0-5) gave up four runs — two earned — four hits and three walks in seven innings with eight strikeouts, lowering his ERA from 7.43 to 6.30.