Polanco, who batted seventh on Monday, was activated from the 15-day disabled list earlier in the day. He had been on the DL with lower back inflammation since July 23 and has battled various injuries throughout the last few years.
Kevin Frandsen played well in Polanco's absence. Manager Charlie Manuel said he will likely start Frandsen on Tuesday and Polanco on Wednesday and platoon them for the near future to keep Polanco healthy.
Polanco said being sidelined with the injury has been frustrating. Asked of his goals for the rest of the season, he said, "to be healthy and contribute and win some games."
In 82 games, Polanco is hitting .255 with two home runs, 15 doubles and 19 RBIs. Frandsen is hitting .329 with a home run, two doubles and six RBIs in 20 games.
"I think he's been playing very good. I think he's done a good job for us," Manuel said of Frandsen. "He's going to continue on getting the chance to play some more. He's earned the right to play."
Polanco, 36, will be a free agent at season's end, so the Phils will have a decision to make at third base.
"I don't know what's going to happen," Polanco said. "I like being here, but whatever happens, happens. You should ask that to the people who have control of the situation. Would I like to be here? I would like to be here. But I don't know what's going to happen."
Jake Kaplan is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.