Rangers beat Astros 7-4 to complete 3-game sweep It’s now 10 straight wins by the Rangers over the Astros in Arlington and three consecutive series sweeps dating to August. In his last two starts at Texas, the lefthander has surrendered 15 earned runs over a combined 102⁄3 innings. In 37 starts by the reigning American League Cy Young winner following losses the last three seasons, the Astros were 25-12 entering Thursday. The Rangers getting to Keuchel early erased an Astros first-inning run…