Texas Rangers prospect Jurickson Profar made his major league debut on Sunday and proceeded to hit a home run in his first major league at-bat. The 19-year-old Profar is the youngest player in the majors, and just the third teenager ever to homer in his first trip to the plate. He's currently ranked as the top prospect in baseball by Keith Law, and he joins a group of elite rookies who've made impressive debuts this season. So what does the future hold for Profar? And who's made the best first impression this season?