A week after he was designated for assignment by the Oakland Athletics, lefthander Travis Blackley will get to see his old teammates this weekend at Minute Maid Park. The Astros sent Class AAA outfielder Jake Goebbert to the A’s to acquire Blackley on Thursday. He’s expected to report to the Astros on Friday in time for the start of a three-game series between the defending American League West champion A’s and the Astros. “To have a guy who can stabilize our bullpen and be protection to our rotation was something we wanted to accomplish,” Astros general manager Jeff Luhnow said. Blackley, 30, split last season between the Giants and the [.]