Scott Williams missed a second consecutive day of training camp with back spasms and is not expected to accompany the Milwaukee Bucks when they open exhibition play Thursday night in Fort Myers, Fla., against the Miami Heat.

"He's not good," Bucks coach George Karl said. "I think the doctors want him to sit out at least two or three days."

Karl said he would not be inclined to subject Williams' back to the plane ride to Florida.

Williams, who has a history of health problems, came down with back spasms last year during training camp. He came back too soon and eventually had to be placed on the injured list.