The Pirates signed three players to Minor League contracts with invitations to Major League Spring Training on Monday. Gorkys Hernandez, an outfielder who was in the Pirates organization from 2009-12, hit a combined .280 with 19 doubles, 16 stolen bases and 40 runs scored in 75 games this past season between Triple-A Omaha, Triple-A Charlotte and the Tigres de Quintana Roo of the Mexican League.