William Bestwick (24 February 1875 – 2 May 1938) was an English cricketer who played for Derbyshire between 1898 and 1926. He was a medium-fast bowler who took over 1,400 wickets for the county, including 10 in one innings. From his wild temperament and reckless behaviour, he was known as a "bad boy" of cricket. 1905 was very little of a rise before a fall, as Derbyshire handed debuts for fifteen players in first-class cricket, ten of whom played fewer than five first-class matches, as Derbyshire finished with a −64% winning percentage, the third-worst of the season.