Almost certainly a Staffordshire man by birth, Parker was one of the esquires retained by Edmund, earl of Stafford, at some point between 1397 and 1403. A conveyance of 1398, whereby he exchanged certain farmland with one of his neighbours, describes him as a resident of Chartley, near Stafford; he also leased property in that area from Earl Edmund (which he kept after the latter’s death in 1403), and was tenant of the neighbouring manor of Hopton until 1407, if not later.
Parker established a lasting and profitable connexion with Henry IV’s half-brother, Sir Thomas Beaufort, who, during his term as chancellor of England, made him a purveyor for the Chancery. Although Parker remained in office after his patron’s dismissal in December 1411, the two men kept up their association, and he subsequently became Beaufort’s deputy as admiral of England. He is first mentioned in this capacity in February 1422, but he may well have assumed the post at any time over the previous ten years, and thus have sat in Parliament as a placeman. Parker was, meanwhile, confirmed in all his offices by Henry V, who employed him both in Staffordshire (on the pay-roll of the duchy of Lancaster) and at Court (as a purveyor). His ability as a deputy admiral was evidently so great that he continued to serve Beaufort’s successor, John, duke of Bedford, having again been confirmed in his other posts by Henry VI.
Parker appears to have retired from public life by 1430, and his later years remain comparatively obscure. In November 1435, he and his wife conveyed property in the Staffordshire village of Bagnall to a purchaser or feoffee-to-uses. Three years later his weir in the Thames was granted to another owner by the Crown, so he may perhaps have died by then. On the other hand, in November 1441, Humphrey, earl of Stafford, awarded an annuity of four marks to John Parker of Stafford, his yeoman cook (a senior position in the household), and not long afterwards a reference occurs to John Parker, groom of the pitcher house at Windsor castle, and holder (in reversion) of the office of porter there. Since the MP was awarded other posts at Windsor when young, it is possible that he lived on into the 1440s, ending his life as he had begun it, a servant of both the Crown and the house of Stafford.
