The Pittsburgh Pirates have released six minor league players, Pirates Prospects has learned. Included in that group are two Cuban players that each received large bonuses. Outfielder Carlos Mesa and pitchers Axel Diaz, Cesar Lopez, Elvin Ramirez, Kirk Singer and Eliecer Navarro were all let go.

Cesar Lopez signed for $600,000 in September of 2010. He was 19 years old at the time and was said to throw 94 MPH with a good sinker and plenty of projection. When he first started throwing, the velocity numbers were in the mid-80s and he never made it out of A-ball, briefly appearing for the Bradenton Marauders last year. His velocity returned late last year in the West Virginia bullpen, but the overall results were just average.

Carlos Mesa signed for $490,000 in May of 2011 and just like ...

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