1. Paul Clemens and Jarred Cosart
The Astros knew that Cosart had huge upside, but during spring training the organization was even more encouraged but what it saw from the 21-year-old pitcher. Clemens, 24, pitched just five innings this spring and allowed only two hits but he has the look of a front of the rotation pitcher. In fact, it's not hard to conceive Cosart and Clemens as the bona fide front two for the Astros for years.
2. Jonathan Singleton
Even before he steps into the batter's box Singleton has the frame of a big-time prospect. He is nimble in his footwork around first base and his size suggests he will be a very productive offensive player. Singleton got 10 at-bats in the spring and produced four hits. In 1,099 minor league plate appearances, Singleton has a .393 on-base percentage. He is only 20 years old.
3. Jason Castro
The Astros hope they can finally watch Castro for a full Major League season. Injuries wrecked 2011 but Castro has been perhaps the most encouragi...