ATLANTA-Adam LaRoche knows how it looks. He doesn’t seem to be trying hard. He comes across as inattentive, sluggish, a little too laid-back to be a professional athlete. When LaRoche was coming-up through the minors, countless coaches and instructors told him to show more emotion. “They would tell me, ‘When you’re playing, we know you want to win, but it doesn’t always look like it,”’ said LaRoche, the Atlanta-Braves’ first-baseman. “They would say, ‘You’ve got to fake it. You’ve got to fake some excitement. You’ve got show them you’re giving 100-percent.”’ LaRoche’s relaxed approach—and a disorder that makes it hard...