From rotoworld.com:

Alex Rodriguez admitted to using steroids from 2001-03 while with the Rangers. The interview with ESPN’s Peter Gammons will go online later Monday. It’s currently unclear whether Rodriguez admitted to using substances beyond what SI.com revealed. Going forward with this story was probably A-Rod’s best option. There’s no good reason to believe him if he says he suddenly decided to stop cheating upon joining the Yankees in 2004, but he has never failed another test. Feb. 9 – 2:33 pm et

Update: Better, more detailed story here.