Former Rice standout Philip Humber was designated for assignment by the Astros on Sunday. Humber, 30, allowed five runs in just 2/3 innings Saturday, blowing a save and earning a loss in an 8-7 defeat to the Rangers at Minute Maid Park. “I didn’t execute some pitches I needed to execute and they made me pay for it,” Humber said after the defeat. The veteran righthander began the season as the Astros’ No. 3 starter, earning a rotation spot during spring training. He began the 2013 campaign showing promise and struggling from a lack of run support. But Humber’s season nosedived after his third start. He’s given up at least [...]