Dennis Frank Pacey (28 September 1928 – 23 September 2009) was an English footballer who played as a striker, mainly for Leyton Orient, Millwall and Aldershot. An ex-pupil of Strode's College, Pacey played for non-league sides Woking and Walton & Hersham before being signed by Leyton Orient in November 1951. He made his debut the following month in an FA Cup tie against Gorleston, and created an immediate impression by scoring a hat-trick in Orient's 5–4 win. He went on to break Orient's FA Cup goalscoring record, scoring 12 goals in all, a record which still stands as of 2011.