In the series opener, Pablo Sandoval was the DH and will be followed by Buster Posey on Tuesday and Melky Cabrera on Wednesday.
Sandoval has played four games as a DH in his career with a .333 average (5-for-15), one home run and three RBIs.
Posey's first game as a DH was in the series opener against the Mariners, where he went 2-for-4.
Bochy said he wanted to get Cabrera "off his legs" by playing him as the DH in the finale. He has played in only two games as a DH in his career with two hits in nine at-bats.