Former NBA referee Tim Donaghy, who pleaded guilty this week to felony betting charges, will point the finger at other officials as he cooperates with federal authorities in a betting probe, ESPN reported Friday.

Donaghy will give prosecutors as many as 20 names of other NBA officials and will detail their participation in gambling activity, ESPN reported. The specifics of the gambling allegations are reportedly believed to include betting in casinos, which referees are banned from doing by NBA regulations.

Click here to read the ESPN report.

Fast Facts: Tim Donaghy Pleads Guilty in NBA Betting Scandal

Other referees said Donaghy acted alone.

"As far as we know, the misconduct was isolated to one individual, and we'll stand by that until proven otherwise," National Basketball Referees Association director Lamell McMorris told ESPN.com. "We'll review whatever information Tim Donaghy alleges, but as far as we're concerned, the only person whose conduct has been proven wrong is Tim Donaghy.”