Both sources told CBS News the defense is paring down its case and may rest as early as next week, although some in the Jackson camp dispute this.
Lawyers are still negotiating terms under which talk show host Larry King would testify in the trial.
There appears to be no definitive word on Jay Leno, but it seems that he will take the stand on Tuesday as well. Chris Tucker is expected to follow those two at some time.
Also, there's still no word on whether Jackson himself will take the stand.
On Wednesday, a young cousin of Jackson testified that he saw Jackson's accuser and the boy's brother fondle themselves in a guest cottage at the singer's Neverland ranch.
The defense elicited the testimony in an apparent effort to show that the accuser engaged in sexual activity on his own.
Rijo Jackson said he was staying with the brothers one night in 2003 when they turned a television to a station showing naked women, began masturbating and suggested he do the same.
"I said I didn't want to 'cause it was nasty," said the witness, who was 10 years old at the time.
On cross-examination by prosecutor Ron Zonen, the boy said he went to Michael Jackson's bedroom to sleep after the incident and told the pop star what the boys were watching on TV.
"He didn't believe it. He thought they were cool and they wouldn't do that," Rijo Jackson said.
Zonen asked whether he told Jackson about the masturbation and the witness said he had not.
"I didn't wanna like tell him 'cause I was scared," Rijo Jackson said.
Jackson, 46, is accused of molesting a 13-year-old boy in February or March 2003, plying the boy with wine and conspiring to hold him and his family captive.