Fress off the presses: Alex Rodriguez has confirmed during an interview this afternoon with ESPN's Peter Gammons that he used performance-enhancing drugs from 2001-03 while a member of the Texas Rangers. "I was young, I was stupid, I was naive, and I wanted to prove to everyone that I was worth . . . being one of the greatest players of all time," Rodriguez told Gammons in an interview recorded this afternoon. "I did take a banned substance and for that I am very sorry and deeply regretful." It was such a loosy-goosy era," Rodriguez continued. "I am guilty of a lot of things . . . negligence, naive, not asking all the right questions. To be quite honest I don't know exactly what substance I was guilty of using." Rodriguez emphasized that the only time he took performance enhancers was during that three-year span. "It wasn't until then [2001] that I thought about a substance of any kind," he said. "And since then I haven't thought about any of that." Rodriguez has not responded publicly since Sports Illustrated reported on its website Saturday that he is on a list of 104 players who tested positive in 2003 during baseball's confidential survey testing, which wasn't subject to discipline. SI.com said he tested positive for Primobolan and testosterone. The Yankees' superstar third baseman decided to give his initial response to the allegations to ESPN. The full interview will be broadcast on the 6 p.m. edition of "SportsCenter" and be posted on ESPN.com. Rodriguez hit 159 home runs during those three seasons with the Rangers -- including 57 in 2002 -- and he was named the American League Most Valuable Player in '03. He was traded to the Yankees following that season.