Former NBA official Tim Donaghy reportedly will give federal prosecutors information that will implicate other referees in some forms of gambling activity, as part of his cooperation with government officials,

ESPN reported.

The offenses might not include any criminal activity, but they could draw the ire of NBA commissioner David Stern, who has insisted the Donaghy situation was that of a "rogue, isolated criminal."

A report on 1050 ESPN Radio in New York said Donaghy will give prosecutors as many as 20 names of other NBA officials and will detail their involvement in some form of gambling activity.

The specifics of the gambling allegations reportedly are believed to include betting in casinos.

The referees union maintained Donaghy is known to be the only referee involved in gambling activities.

"This incident is an isolated incident and our folks are of the highest integrity and character and we're open to sitting down with the NBA to discuss measures that help make sure that the integrity of the game is maintained," said Lamell McMorris, head of the referees union.

"As far as I know, our folks are of the highest character. This situation has been isolated to one individual."

NBA spokesman Brian McIntyre said the league had received no information regarding the possibility of other officials being investigated.

The NBA's collective bargaining agreement with the officials bans gambling by referees, although there is one exception - officials are allowed to go to racetracks and bet on horses during the offseason.

Donaghy, who pleaded guilty on Thursday and was released on $250,000 bond, faces a maximum of 25 years in prison when he is sentenced Nov. 9 for conspiracy to engage in wire fraud and transmitting betting information through interstate commerce.

He must pay a $500,000 fine and at least $30,000 in restitution to the government.

Donaghy isn't saying much about the betting scandal that brought him down and rocked the league, but he is offering an apology.

"I'm very sorry about what happened," Donaghy told the New York Daily News at his home in Bradenton, Fla.

"This is an ongoing case - I can't say anything else," he said.

Donaghy and his family had skirted reporters during the weeks leading up to his guilty plea, even covering a glass door to their home with a sheet.

After returning home Thursday, he agreed to be photographed with his daughters and the family dog.