Bogut's back began flaring up last weekend before a game against Oklahoma City. He played and finished with eight points and 12 rebounds in 28 minutes.
Bucks coach Scott Skiles said the 7-footer, who did not practice earlier this week, is day to day. Skiles expects him to be back for Saturday's game against Charlotte.
Bogut underwent an MRI that didn't show any damage. He's averaging 11.6 points and 10.9 rebounds for the Bucks, who have lost three in a row.
Forward Carlos Delfino is recovering from a neck sprain and concussion-like symptoms that has kept him out of Milwaukee's lineup.
General manager John Hammond says Delfino had an evaluation Wednesday that found him about 90 percent free of concussion-like symptoms.
It's recommended Delfino have two to three days of additional rest, followed by low-impact physical activity. Without any setbacks, Delfino could return to normal basketball activity in about two weeks.
Delfino has missed the last six games.
Information from The Associated Press contributed to this report.