Peralta's injury apparently happened during Thursday's off-day in Philadelphia.
"We had the off-day and a lot of guys just rested, and sometimes when you lay in bed too long your back gets messed up," Hale said. "We're going to get him healthy, and hopefully he'll be back as soon as tomorrow."
Steve Gilbert has covered the D-backs for MLB.com since 2001. Follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.