"We'll see," Phillies manager Charlie Manuel said.
Werth, sidelined by a right oblique strain, played his second rehab game with Clearwater of the Florida State League on Friday after going 1-for-3 with a walk the previous night.
The Braves will start rookie left-hander Jo-Jo Reyes against the Phillies on Saturday, and Werth's right-handed bat would fit nicely into the lineup.
"He's got a couple of hits off Reyes," Manuel said.
The outfielder is hitting .309 against lefties this season. His overall average is .260, and he has nine homers and 26 RBIs in 40 games.
Werth, who tweaked his oblique in the eighth inning of a game against Houston on May 22, played eight innings in right field Thursday as Clearwater defeated St. Lucie, 9-8. He was back in the lineup Friday night.
The 29-year-old batted .298 for the Phillies last year with eight homers and 49 RBIs in 94 games. He missed a month because of an injury to his left wrist.
Right-handed reliever Francisco Rosario began a rehab assignment with Clearwater on Friday. He was placed on the disabled list in March because of shoulder problems.
Guy Curtright is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.