Philip Humber isn’t going to overreact. But he would like a do-over on the second inning he threw against the St. Louis Cardinals. After running through a 1-2-3 first frame Monday and throwing only eight pitches, the former Rice standout needed 35 just to escape the second inning. Humber walked off the mound having allowed three walks, one hit, one earned run and a wild pitch, taking the loss in the Astros’ 10-2 spring training defeat at Roger Dean Stadium in Jupiter, Fla. “When I came in the dugout, I told them, ‘My bad. I’ll try not to let that happen again,’ ” said Humber, who’s competing for a spot [...]