It may seem hard to believe after their exemplary 2012 seasons. But this time last year, Bryce Harper and Mike Trout were just a couple of exciting prospects with everything to prove. The beauty of spring training is endless possibility, and there's no shortage of young players with the talent to match last season's rookies of the year.

Texas shortstop Jurickson Profar made waves in his brief major league debut last year, homering and doubling in his first two at-bats. The consensus top prospect in baseball, Profar possesses a great plate approach, good speed and top-shelf defense. Scouts project that as he fills out, he could develop into a Hanley Ramirez-type hitter. All that's holding the 19-year-old Profar back is a logjam of Rangers infielders blocking his playing time.

Stud outfielder Wil Myers slammed 37 homers across Double-A and Triple-A for the Royals last year before they surprisingly shipped him to Tampa Bay in a package for James Shields. Myers will start the season in the minors, but he will spend the spring trying to show Rays fans why he's viewed as a future home run champion.

Dylan Bundy made his first major league appearance for the Orioles in September, a little more than a year after he finished high school. With a dominant fastball that reaches 98 mph, Bundy will test his heat against baseball's best in the spring before he heads back to the minors to work on his curveball and change-up. Once Baltimore's brass is satisfied with his progression, don't be surprised to see him making key summer starts for the Orioles.

- Elliot Smilowitz