As part of the tribute, the team showed clips of Williams, an ardent Giants fan, on the Jumbotron. Williams' children all wore jerseys with their last name on the back, and a photo of one of the jerseys can be seen below.
"We are honored to be here in tribute to our father, someone who loved his hometown and especially the Giants," Zak, Zelda and Cody said in a statement. "For all of us, it is a tremendous delight and a little surreal to throw out the ceremonial first pitch of a World Series game for our team to our dad's best friend."
The statement adds that the comic legend's three kids "could not think of a better way to celebrate his memory."
The Giants honored Robin during a regular-season game against the Chicago White Sox on Aug. 12, the day after his death. Robin lived in San Francisco while breaking into the city's comedy scene, and he later owned several homes in the area.
This article originally appeared in THR.com.