While veteran righthander Philip Humber searches for answers, first-year Astros manager Bo Porter stands behind his No. 3 starter. Porter on Friday said he has no plans to change the rotation, despite starters struggling to reach the fifth inning and sporting a combined ERA of 5.96, worst in MLB. “These guys have earned the right to start and you’re not going to see me panic within one month of the season,” Porter said prior to Friday’s game against the Red Sox at Fenway Park. Humber, 30, has yet to record a win this season and leads the majors in losses (five). His 7.99 ERA has been inflated by his past [...]