Bochy named right-handers Jean Machi (5-0, 0.40) and Juan Gutierrez (1-1, 3.92) and left-handers Jeremy Affeldt (0-1, 1.84) and Javier Lopez (0-0, 2.25).
George Kontos was recalled from Triple-A Fresno to take the roster spot of Casilla, who was sent to the disabled list after hurting himself trying to beat out an infield grounder.
"We have guys who are accustomed to pitching late in games," Bochy said.
Rick Eymer is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.