Lucas Harrell, who was skipped from his previous scheduled start because of a right groin injury, is eager to get back on the mound Saturday night when the Astros face the Washington Nationals. “Tomorrow I’ll be able to get back after it and get my first game in 10 days,” he said. “I’m excited about that. It’s great because my leg feels great and my body feels great. “We were just cautious. It wasn’t anything that we thought there was something serious. It’s just something that was small and we wanted to make sure that I was right before we broke camp.” Because pitchers derive much of their power from their legs, the groin muscle is more crucial than fans realize. “When you push off with your throwing leg, especially being on my right leg, that’s your power leg,” he said. “You got to be able to use all your strength. Mine wasn’t really hurting when I was pushing off. It was more like when I turned. I think that’s what happened when I was running to first and I tweaked it. “It was when I rotated. Now I’ve been doing stop-and-go, (pitcher’s fielding practice) and all that stuff. I don’t feel it anymore. It’s really important to pitching. People don’t know. They might see that and think that it’s not something serious. It could be a little more serious than you could think.”