So, I take it you believe Mentzer was better than Arnold?
Not bad for a guy with child bearing hips & a large ass.
There's another pro I can think of (with child bearing hips & large ass) that never did this good.
          Mike Mentzer
1971 Mr. America - AAU, 10th 
1971 Teen Mr America - AAU, 2nd 
1975 Mr. America - IFBB, Medium, 3rd 
1975 Mr. USA - ABBA, Medium, 2nd 
1976 Mr. America - IFBB, Overall Winner 
1976 Mr. America - IFBB, Medium, 1st 
1976 Mr. Universe - IFBB, MiddleWeight, 2nd 
1977 North American Championships - IFBB, Overall Winner 
1977 North American Championships - IFBB, MiddleWeight, 1st 
1977 Mr. Universe - IFBB, HeavyWeight, 2nd 
1978 USA vs the World - IFBB, HeavyWeight, 1st 
1978 World Amateur Championships - IFBB, HeavyWeight, 1st 
1979 Canada Pro Cup - IFBB, 2nd 
1979 Florida Pro Invitational - IFBB, 1st 
1979 Night of Champions - IFBB, 3rd 
1979 Mr. Olympia - IFBB, Heavyweight (over 200 pounds) 1st, Overall 2nd 
1979 Pittsburgh Pro Invitational - IFBB, 2nd 
1979 Southern Pro Cup - IFBB, 1st 
1980 Mr. Olympia - IFBB, 5th