According to a story in the LA Times, former Phillie Jason Grimsley accused former teammates Roger Clemens and Andy Pettitte used performance-enhancing drugs, while Miguel Tejada, Brian Roberts and Jay Gibbons used anabolic steroids.
Grimsley, as some remember, was involved in a bizarre incident this summer when federal agents raided his home, implicated several former teammates, and was asked to wear a wire to help feds in their steroid and baseball investigation... if there is such a thing.
Not to go out on a limb or anything, but I'm going to guess that Clemens, Pettitte and the others will either deny the allegations or refuse to talk to reporters about the accusations.