On 9 January 1479 Morton became Master of the Rolls, losing it on 22 September 1483 when his uncle opposed Richard III of England. Morton also played a part in the campaign against Richard, and was with Henry Tudor at the Battle of Bosworth. After Henry became king, Morton was again made Master of the Rolls on 13 November 1485.[1]
On 16 October 1486, Morton became Bishop of Worcester, and he was consecrated on 28 January 1487. On 15 March 1497, he received a pardon from Henry VII, which was intended to secure his property against extortions. He was the last English Bishop of Worcester before the English Reformation, with his successors being Italian, and served until his death in May 1497. He was buried in Old St Paul's Cathedral rather than his own Worcester Cathedral.[2] As a result, his grave and monument were destroyed in the Great Fire of London in 1666. His name is now listed on a monument in the crypt giving the names of important graves lost.
Due to the large absence of material on his life from 1458 to 1477, where Morton is recorded receiving a papal dispensation, he is sometimes considered to be the same man as Robert Morton, a composer who lived at around the same time.[2]