Check out this link I found on MLB.com. It allows you to track the progress of baseball's Top Prospects. You can see who Top 50 in all of baseball, the Top 10 by team and the Top 10 by position.
Some players, like the Washington Nationals Top Prospect, Bryce Harper (#2 overall) where highly touted and have stayed their, while others, like the Phillies Domonic Brown where drafted low (20th round, 607th overall but is now the #3 overall) made their way to the top of the class. What about your team's top pick from a few years ago? See if he's still on the list.