DETROIT — Texas Rangers starter Jack Leiter retired the first 12 batters he faced and struck out 10 to match his career high. He was pitching the best he had all season. But the home run he allowed to Spencer Torkelson on a middle-middle slider in the fifth inning gave the Detroit Tigers a 2-0 lead and helped start the Rangers (16-18) on a slide toward a 7-1 loss on Sunday night. Rangers manager Skip Schumaker felt that Leiter's line — 6.2 innings, five hits, five runs, one walk and 10 strikeouts — didn't tell the entire story of his game. "The ball was coming out of his hand as good as I've seen this whole year," he said. "He had really carry behind it. I thought the change-up might have been the best he's had the whole year." But it only yielded frustration for Leiter (1-3), who felt nothing change in his approach, even after the home run. "All you try to do is attack, attack with your best stuff and I feel like I did a good job of that, a good job of the game plan," he said.…