Federal prosecutors outlined Tim Donaghy's cooperation in its case against two co-conspirators in a gambling scheme as "significant both in its timing and scope", but refused to say whether they would prosecute two other Delaware County friends to whom the fired NBA referee provided information.

The information was made public today when U.S. District Court Judge Carol Amon unsealed a government letter that sought a reduced penalty for Donaghy, who faces up to 25 years in prison when he is sentenced on July 14.

The document again noted that Donaghy also told authorities about other NBA officials who had made wagers in violation of league guidelines, but did not identify them.

The letter provided more details on how Donaghy, a 13-year NBA official, provided inside information to his former high school friends, James Battista and Thomas Martino.

Among the new revelations was a code that the men, all classmates at Cardinal O'Hara High School, had devised to discuss their NBA picks over the phone.

Donaghy used the names of Martino's brothers to indicate which team the men should bet on. "Chuck", the brother who still lived in the Philadelphia area, meant the home team. "Johnny", who had moved away, indicated the visitors.

Battista, 43, of Phoenixville, described as a professional gambler, faces 10-16 months in prison., Martino, 43, of Marcus Hook, could get 12 to 16 months. They are due to be scheduled in the Brooklyn court on July 11.

Although the letter repeats Donaghy's contention that Battista coerced him into providing inside information by threatening to disclose his previous gambling to the NBA -- claims Battista's lawyer denies -- it also notes that the referee was a "willing participant" in the scheme that paid him $2,000 for every correct tip.

But according to the letter, originally filed under seal on May 8, Donaghy actually had a longer gambling relationship with two other Delaware County men, Jack Concannon and Pete Ruggieri.

Donaghy told authorities that because of his gambling losses at an Atlantic City casino, he was "pressured" by Concannon to provide inside information on NBA games.

He said he gave "recommendations" to Concannon, a former basketball star and coach at Monsignor Bonner, on approximately 40 NBA games a year from 2003 through 2007.

Sources indicated that Concannon and Donaghy met frequently at the Concord Country Club in Concordville to discuss their betting, which also included wagers on other sports.

The referee told prosecutors he earned $10,000 to $30,000 annually on the bets, which Concannon placed through Ruggieri, whom the letter described as a professional gambler.

The government "declined to disclose whether it is pursuing, or will be pursuing, charges" against Concannon and Ruggieri.

"My client was interviewed by the FBI and responded truthfully to their questions," Joseph Fiorvanti, Concannon's attorney, said."He does not expect to be indicted. He has no organized crime connections. He's just a guy who bet games with Donaghy."

Ruggieri's attorney could not immediately be reached for comment.