Testimonial October 24th 1973 v Manchester City
Dunne was a pacey full back, confident on either flank, who represented the Irish Republic at both amateur and professional levels. He broke into United's first team in 1961/62, replacing the injured Noel Cantwell, although it would be a couple of seasons before he made the left back berth his own.
Dunne's importance to the side was underlined during the 1964/65 League title campaign, when he was ever present, and when United captured the title two seasons later, Dunne missed just two League games.
He joined United in April 1960 from Shelbourne for a fee of £5,000, although the transfer was delayed to allow him to appear in the FAI Cup Final, which Shelbourne won.
Dunne lost his place early in 1973 and was released, prematurely, that summer on a free transfer by Tommy Docherty. He joined Bolton Wanderers, managed by ex Red Ian Greaves, and played for a further six seasons, making almost 200 senior appearances for the 'Trotters'. Dunne helped them reach the League Cup semi final in 1977 and to the Second Division Championship a year later. He played in both League games against United in 1978/79 before a move to Detroit Express in the NASL.
Dunne eventually retired retiring from playing in 1979 and accepted the assistant manager's position at Burnden Park.