"I could have used him [to pinch-hit]," Bochy said after San Francisco's 3-2 Interleague victory.
Bochy said Sandoval would be re-evaluated Wednesday morning before he decides whether to start the two-time All-Star in the series finale.
Plagued by injuries in previous seasons, Sandoval has started 105 of San Francisco's 125 games this year. In his last eight games, the switch-hitter was batting .414 (12-for-29) with seven RBIs.
Shortstop Brandon Crawford, originally slated to bat eighth, occupied the No. 6 spot in the batting order that Sandoval vacated. Joaquin Arias replaced Sandoval at third base, batting eighth. Arias started his 33rd game of the season, including 15 at third base.
Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.