I agree with those saying after the first Bowe fight. It was a slow burn, and after initially dimming, his flame flickered up again in a second peak of sorts. But I don't think Holyfield or Bowe were ever quite the same after their first war.
Bowe 3 was for a medical condition he had. I don' recall him gassing in Moorer 2 but I haven' viewed that bout in awhie