Hafner returned from the 15-day disabled list on Wednesday, and Acta said he wouldn't be able to play every day. Hafner went 2-for-11 with a home run in the three games since returning from knee surgery that sidelined him for more than a month. He went 0-for-4 and grounded into two double plays in Friday's 10-3 loss.
"I'd rather be playing," Hafner said, "but coming back from surgery, you can't run out there every day. It's good to have a day to kind of have it recover a bit. It's been a little sore running, but overall, it's good."
Acta said he liked what he saw from Hafner in his first few games back.
"He's a presence," Acta said. "I just hope we can have him for the rest of the season."
Shelley Duncan was in the lineup at DH instead of Hafner for Saturday night's game against the Rays, and Jose Lopez replaced Kipnis at second.
Both Duncan and Lopez have been swinging hot bats of late. Entering Saturday, Duncan was hitting .375 (9-for-24) with four doubles, three home runs and seven RBIs over his last seven games, with homers in three of his last four games. Lopez, meanwhile, entered Saturday's game hitting at a .500 clip (12-for-24) with three doubles, a homer and seven RBIs in his last eight games.