Leslie Arthur O'Neill (born 4 December 1943) is an English former professional football player and manager.
He turned professional with Newcastle United in 1963 but was unable to establish himself in the first team.
He then made over 100 first team appearances for each of Darlington, Bradford City and Carlisle United.
With Carlisle he made it to the top flight of English football in the same team as Chris Balderstone and Bobby Parker.
[3] He next played in Scotland for Dumfries club Queen of the South where he was re-united again with Balderstone.