The decision will come down to how the starting pitchers are faring and how deep they're pitching into games, Bochy said.
"What's more important for us right now?" Bochy said, sharing the question he'll soon face. "Having an extra pinch-hitter, or have an extra pitcher?"
In its last 14 games, San Francisco's bullpen has notched a 1.44 ERA. This season, it owns the second-best ERA (2.44) in the National League behind Atlanta.
Willie Bans is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.