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 in the back end of the Astros’ starting rotation.

Humber’s fastball was solid, hitting 92 mph and staying along the corners of the plate. But his off-speed pitches were often off target. The 30-year-old acknowledged that throwing a 3-2 breaking ball to designated hitter Allen Craig, who led off the Cardinals’ second, was a “stupid” idea.

“That’s not very smart,” Humber said. “That’s obviously something I probably wouldn’t have done in a regular-season game. … No one wants to get beat, no matter if you’re playing tiddlywinks or whatever.”