Pederson was added to the lineup for Friday's game against the Rockies, Maria I. Guardado of MLB.com reports.
Colorado is sending left-hander Ty Blach to the mound and Pederson usually sits versus southpaws, but he's been pressed into duty with Austin Slater (dizziness) having to be scratched. Thairo Estrada (conjunctivitis) was also removed from the Giants' initial batting order.