Marcus Semien hit an RBI single in the 10th inning and the Texas Rangers beat the Atlanta Braves 6-5 on Saturday night, seven innings after the second baseman took a 94.6 mph fastball to the helmet. Semien’s solid shot up the middle off Enyel De Los Santos (3-3) gave the Rangers their fifth straight victory. It came after the Braves intentionally walked Corey Seager to start the 10th. Atlanta took 5-4 lead in the ninth. Michael Harris II led off…