Commentators wondered whether the punishment Ali took in his last six years in the ring may have brought on his Parkinson 's syndrome .
After Ali 's draining victory against Joe Frazier in 1975 , he never seemed the same .
Commentators wondered whether the punishment Ali took in Ali 's last six years in the ring may have brought on his Parkinson 's syndrome .
After Ali 's draining victory against Joe Frazier in 1975 , he never seemed the same .