Mordecai Sherwin (26 February 1851 in Greasley, Nottinghamshire, England – 3 July 1910 in Nottingham, England) was a professional footballer and cricketer who played in goal for Notts County and as a wicket-keeper for Nottinghamshire between 1878 and 1896.
As a footballer, Sherwin played in goal for County during the 1870s and early 1880s and was, according to the sportswriter "Tityrus" (the pseudonym of J.A.H. Catton, editor of the Athletic News), the idol of the crowd despite his unpromising physique:
As a cricketer, Sherwin captained Nottinghamshire in 1887 and 1888. He also played three Test matches for England on the tour to Australia in 1886/7. He was named as one of the Wisden Cricketers of the Year in 1891.
After he retired as a cricketer, he umpired until 1901, and even stood in one Test in 1899. By trade, Sherwin was a publican. Sherwin had a wife, Emma, and at least six children, Mary, William, Emma, Ellen, Mordecai and Frederick.
The name of Arthur Conan Doyle's most famous character, Sherlock Holmes, is said to have been inspired partially by Sherwin, and partially by Frank Shacklock.