Pedro Hernandez is an option to be called up to start on Saturday for the Rockies. He would be taking the rotation spot of Juan Nicasio, who was optioned to Triple-A Monday. With an off day Thursday, the club has the option of skipping Nicasio's turn, but manager Walt Weiss wants to give his other starters some extra rest. Hernandez holds a 5.92 ERA at Triple-A Colorado Springs this season but does have some big league experience.