Redick has missed the previous four games and was already ruled out of Tuesday's game against the San Antonio Spurs with a hip injury. But after seeing a specialist, concerns about his back prompted the team to take a more cautious approach to give him the best chance of being healthy for the playoffs, sources said.
"He has a bulging disk so until that calms down so he can get his movement back, he'll be out," Rivers said. "That could be three days, two weeks, three weeks. No one knows. There's no set deadline on when he's coming back. He can be back quick or it could take a while. I don't think anybody knows."
Redick has been a valuable contributor for the Clippers this season after coming over in a sign-and-trade from the Milwaukee Bucks last summer.
The sharp-shooting guard is averaging 15.7 points on 46 percent shooting from the field in 30 games this season.
"I don't think we're going to put him out there until he's feeling great," Rivers said.
Rivers, who had said Monday he didn't anticipate the Clippers making a move entering Thursday's trade deadline, said the injury doesn't change the team's plans.
Information from ESPNLosAngeles.com's Arash Markazi was used in this report.