Sir Donald George Bradman, AC (27 August 1908 - 25 February 2001), often referred to as "The Don", was an Australian international cricketer, widely acknowledged as the greatest batsman of all time. Bradman's career Test batting average of 99.94 has been cited as the greatest achievement by any sportsman in any major sport. The story that the young Bradman practised alone with a cricket stump and a golf ball is part of Australian folklore. Bradman's meteoric rise from bush cricket to the Australian Test team took just over two years.

Bradman joined the Royal Australian Air Force (RAAF) on 28 June 1940 and was passed fit for air crew duty. The RAAF had more recruits than it could equip and train and Bradman spent four months in Adelaide before the Governor-General of Australia, Lord Gowrie, persuaded Bradman to transfer to the army, a move that was criticised as a safer option for him. Given the rank of Lieutenant, he was posted to the Army School of Physical Training at Frankston, Victoria, to act as a divisional supervisor of physical training. The exertion of the job aggravated his chronic muscular problems, diagnosed as fibrositis. Surprisingly, in light of his batting prowess, a routine army test revealed that Bradman had poor eyesight.  Invalided out of service in June 1941, Bradman spent months recuperating, unable even to shave himself or comb his hair due to the extent of the muscular pain he suffered. He resumed stockbroking during 1942. In his biography of Bradman, Charles Williams expounded the theory that the physical problems were psychosomatic, induced by stress and possibly depression; Bradman read the book's manuscript and did not disagree. Had any cricket been played at this time, he would not have been available. Although he found some relief in 1945 when referred to the Melbourne masseur Ern Saunders, Bradman permanently lost the feeling in the thumb and index finger of his (dominant) right hand.  In June 1945, Bradman faced a financial crisis when the firm of Harry Hodgetts collapsed due to fraud and embezzlement. Bradman moved quickly to set up his own business, utilising Hodgetts' client list and his old office in Grenfell Street, Adelaide. The fallout led to a prison term for Hodgetts, and left a stigma attached to Bradman's name in the city's business community for many years.  However, the SA Cricket Association had no hesitation in appointing Bradman as their delegate to the Board of Control in place of Hodgetts. Now working alongside some of the men he had battled in the 1930s, Bradman quickly became a leading light in the administration of the game. With the resumption of international cricket, he was once more appointed a Test selector, and played a major role in planning for post-war cricket. Answer this question using a quote from the following article:

What was wrong with him?
chronic muscular problems, diagnosed as fibrositis.