"Pablo is fine, giving him a day off," Bochy said. "He hasn't had a day off in a while, [and] this will give him two days to hopefully freshen him up."
Sandoval, who hit .330 with 90 RBIs last season, is currently hitting a respectable .280, though with only 29 RBIs. The decline in production prompted Bochy to move Sandoval into the fifth spot in the lineup just over a month ago -- a place where he will remain in the foreseeable future.
"Right now I'm probably going to leave him where he is down there," Bochy said. "I think he's getting more and more comfortable. Sometimes he gets a little fast with his stride and gets himself in trouble, but he's getting close."
Bochy also cited Blue Jays starting pitcher Shaun Marcum as another reason for leaving Sandoval out of Sunday's contest.
"[Marcum's] numbers are [significantly better] between righties and lefties," Bochy said. "If you're going to give him a day, it would be today -- get another right-handed batter in there."
While Sandoval is a switch-hitter, he is hitting only .229 with no home runs from the right side.
"I think it kind of goes year-to-year with switch-hitters," Bochy said. "You go back to Randy Winn -- two years ago he did such a great job right-handed and last year it was such a struggle for him. Sometimes you just get out of sync."