HBO Films is planning to turn a best-selling book about Barry Bonds' alleged steroid use and the federal government's wide-ranging probe into performance enhancing drug use in sports into a movie, one of the book's authors said Thursday.

Lance Williams, a reporter at the San Francisco Chronicle, said that Ron Shelton has been tapped to direct the flick and will co-write the script with "Tin Cup" partner John Norville once the Hollywood writers strike is settled.

The planned movie based on the book "Game of Shadows" was first reported Wednesday by Variety.

Williams co-wrote the book with sports writer Mark Fainaru-Wada, who recently left the Chronicle to join ESPN.

Much of the book was based on secret grand jury testimony of Bonds and other famous athletes leaked to them by Troy Ellerman, a disbarred attorney sentenced to 21/2 years in prison for denying under oath he was the reporters' source.

The book recounts how Bonds allegedly began using steroids in 1999 after becoming jealous of Mark McGwire setting Major League Baseball's single season home run mark the previous season.

An HBO spokesman declined to comment.

Giants: The club named longtime baseball veterans Ron Schueler and Joe Lefebvre as senior advisors of player personnel and Ed Creech senior advisor of scouting. The team also announced that Matt Nerland has been appointed special assistant of scouting.

Rockies: Yorvit Torrealba is staying in Colorado, agreeing to a two-year deal worth about $7 million with a mutual option for 2010. Torrealba, who filed for free agency after helping the Rockies reach the World Series, was set to sign a three-year contract for about twice the money with the New York Mets this month. The Rockies got back into the mix when that deal fell apart and the Mets traded for Johnny Estrada instead.