From the Wikipedia page 
Walter was a firm adherent of Warwick "the king-maker", and on 7 November 1460 he was appointed High Sheriff of Staffordshire. Apparently he held the office for the usual term, undisturbed by the varying fortunes of the party. On 26 January 1461–2 he is styled a ‘king's knight,’ and was granted the manors of Ramsham and Penpole, Dorset, formerly belonging to William Neville, 1st Earl of Kent. Grants of the manors of Clynte, Hondesworth, and Mere in Staffordshire, formerly belonging to the Lancastrian James Butler, Earl of Wiltshire, soon followed, and on 14 June 1463 Wrottesley was one of those to whom Warwick was allowed to alienate manors and castles, although their reversion might belong to the crown. Wrottesley joined Warwick in his attempt to overthrow the Woodvilles, and when in 1471 the king-maker restored Henry VI, Wrottesley was put in command of Calais, a stronghold of the Nevilles. After Warwick's defeat and death at Barnet on 14 April, After Warwick's defeat and death at Barnet on 14 April, Wrottesley surrendered Calais to Edward IV in exchange for a free pardon.
He died in 1473 and is said to have been buried in Greyfriars Church, London. By his wife Jane, daughter of William Baron of Reading, he left two sons — Richard, who succeeded him, and was Sheriff of Staffordshire for 1492–3, and William — and three daughters. His descendant, Sir Walter Wrottesley (d. 1659), was created a baronet in 1642, and the seventh baronet, Sir Richard Wrottesley (d. 1769), Dean of Worcester, was grandfather of John, first Baron Wrottesley.