"You've got to keep going, keep doing what you're doing," Bochy said before Friday's game. "We just want to throw some other variables in this, make sure we cover everything."
Buster Posey started as the team's designated hitter in the first game of the Giants' final Interleague series.
"It gives Buster a break," Bochy said. "Either him or Hector were going to DH today, so I just decided to DH Buster and let Sanchez catch."
Sanchez caught Lincecum's bullpen session earlier this week in anticipation of catching him Friday, and Bochy said the move is a temporary one, even if Lincecum breaks out of his season-long slump with Sanchez behind the plate.
"This isn't the way it's going to be, just today," Bochy said. "It's just a little thing that you do occasionally with your club to shake things up."
Sanchez has served as the team's backup catcher, though he has been the primary catcher for starter Barry Zito. Bochy said he could make a similar move and have Posey catch Zito.
"Buster's our catcher," Bochy said. "It's nothing to do with Buster. He'll be catching Timmy. We have a lot of baseball left. It's pretty much a one-time deal."