SAN FRANCISCO — Prosecutors have identified a previously undisclosed witness who they say she saw Barry Bonds' personal trainer inject him.

In a court filing Friday, prosecutors said they will call Bonds' former personal shopper Kathy Hoskins to tell the jury that she saw the injection, though the filing did not say whether she believed it was steroids.

Prosecutors also said they plan to call Jason Giambi of the Oakland Athletics and six former baseball players: Jason's brother Jeremy Giambi, Benito Santiago, Armando Rios, Randy Velarde, Bobby Estalella and Marvin Benard.

They said Estalella will testify Bonds told him he was using performance-enhancing drugs.