Theriot had just two at-bats in the last five games. He spent last Thursday night in a hospital with a stomach virus. He has not started a game since April 18 against Philadelphia.
"They could use a break," said Bochy of Crawford and Burris. "I need to get Theriot out there because he's missed some time and he needs his at-bats. Arias has been going well, so we'll keep him going by giving him a start today."
Entering Thursday, Crawford had played in 157 of the Giants' 158 2/3 innings this season while Burriss had started 13 games in place of the injured Freddy Sanchez. Arias joined the club Wednesday after his contract was purchased from Triple-A Fresno. He was hitting .400 with the Grizzlies and lined out hard to pitcher Aroldis Chapman in the eighth inning of Wednesday's 4-2 loss.