Polanco has been on the 15-day disabled list with lower back inflammation since July 23, meaning he was eligible to be activated on Tuesday. It appears the injury is going to keep him sidelined a little longer than the 15 days, though, as Polanco has yet to even field ground balls before a game.
"I think that once he starts taking ground balls, that will be an indication that he's moving along," manager Charlie Manuel said before Tuesday's game against the Braves.
Kevin Frandsen has filled in nicely in Polanco's absence. Frandsen, who was promoted from Triple-A Lehigh Valley on July 27, started his ninth consecutive game at the hot corner on Tuesday.
Frandsen entered Tuesday's game against the Braves hitting .310 with a home run and two RBIs. He's committed one error in 19 chances in the field.
"He's holding his own," Manuel said. "He's been playing pretty good."