Former referee Tim Donaghy pleaded guilty to two felony charges Wednesday in an NBA betting scandal that rocked the league and raised questions about the integrity of games.

Donaghy faces a maximum of 25 years in prison when he is sentenced for conspiracy to engage in wire fraud and transmitting wagering information through interstate commerce.

Donaghy provided recommendations, called "picks," to co-conspirators about what team they should bet on, said U.S. District Court Judge Carol Bagley Amon. If he was correct, they paid him.