Boxing legend Muhammad Ali is being treated in a hospital for a respiratory issue. The three-time world champion Ali, 74, is being treated by doctors as a precaution and is described as being in a fair condition. A brief hospital stay is expected. Ali was diagnosed with Parkinson's disease in 1984, after quitting boxing. Family spokesman Bob Gunnell confirmed Ali's condition but did not divulge which hospital was treating him or when he was admitted.