david epstein, welcome. so it's pretty much already well known and believed that mark maguire used steroids to... when he was hitting his home runs, right? >> that's right. i think when you go in front of congress and you tell them when they ask you if you used performance enhancing drugs you say you're not there to talk about the past it's pretty much the end of that story. it's been a foregone conclusion for a whi. >> lehrer: why did he finally come clean today or yesterday? >> well, going in, you know, he'll be going into the season as the cardinals' hitting coach. if he hadn't, this just would have been a protracted game of media speculation and criticism. i think he kind of opted to have this story burn brightly and briefly rather than just drag out and distract him from what was going on in the field and with the team he'll be working for. >> lehrer: what do you make of maguire's claim to bob costas that there's no connection between his steroid use and the fact that he hit all these home runs? >> i me