By Ray Hacke OAKLAND, Calif. — Called into emergency duty as the Astros’ starting pitcher, Lucas Harrell found himself unable to put out a fire Sunday afternoon at O.co Coliseum. The righthander was lit up for seven runs in a third-inning rally capped by designated hitter Seth Smith’s three-run homer in a 7-2 loss to the Oakland Athletics before a crowd of 18,824. A sinkerball pitcher, Harrell (6-16) thought he wasn’t getting calls down low from plate umpire Hunter Wendelstedt. When he tried to adjust his pitches, the A’s teed off. “When you throw sinkerballs and you try to elevate the ball, you’re going to get hit,” Harrell said. Disputed [...]