Clayton Blackburn, Kyle Crick and Chris Stratton—the San Francisco Giants’ top three prospects according to Marc Hulet of FanGraphs—won’t be in big league camp this spring. None of those three pitching prospects have pitched above A-ball yet, so Giants fans will have to remain patient on that front.

However, just about everyone else in the organization’s top 15 prospects will be at spring training with the Giants. The most exciting prospects to look out for this spring are outfielder Gary Brown, infielder Joe Panik, reliever Heath Hembree and starting pitcher Chris Heston. Brown and Panik need at least another year of minor league experience, but Hembree and Heston are just about ready for the show.

Let’s take a look at what each of these prospects brings to the table.

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