SURPRISE, Ariz. - Jonathan Hernandez, 21, is the youngest pitcher in the Rangers spring training camp. If not quite old enough to be his father, Bartolo Colon, 44, is old enough to have played with Hernandez's father.True story: He did.Hernandez is part of a group of the Rangers' youngest pitching prospects in camp and this group has been assigned to work with Colon, a master of the art of strike-throwing.