ESPN on Wednesday broadcast portions of a secret recording of Greg Anderson, Barry Bonds' weight trainer, discussing the regimen of "undetectable" drugs that he said he gave the Giants star in 2003. Contents of the recording were first revealed in a Chronicle report in 2004. ESPN broadcaster Bob Ley said the network had independently obtained its own copy of the recording. Anderson, who pleaded guilty to steroid-dealing in the BALCO case, has been in federal prison since November 2006 for refusing to testify before a grand jury that is investigating Bonds on suspicion of perjury. "The whole thing is, everything that I've been doing at this point, it's all undetectable," Anderson said on the recording. "See the stuff I have, we created it, and you can't buy it anywhere else, can't get it anywhere else, but you can take it the day of (the test), pee, and it comes up perfect." Anderson also said, "It's the same stuff that they went to the Olympics with, and they test them every f -- ing week at the Olympics, so that's why I know it works, so that's why I'm not even tripping."