Viator is full of it on this one, Mike told me himself that he terminated training with Casey as a partner, because when they were training together "that I was doing a set of Incline presses on the Universal with Casey spotting and he eyes were rolling back in his head, I said to Casey, this is IMPORTANT to me". Mike admitted using Deca to me and Dianbbol- IN the higher end of PRESCRIBED THERAPEUTIC doses. ie the 400 mg of Deca, 30 mg of dianabol stated above. Very hard training (MUCH harder and more effective than most pros do today) and great genetics made Mentzer huge, not just steroids.