Ray Treacy Rovers fans when his penalty against Sligo helped win the FAI Cup in 1978. Treacy almost scored a hat trick for the Republic of Ireland national football team against Turkey in April 1978. The two goals he scored (along with the game's opening goal by Johnny Giles) represent the last occasion that a home-based player has scored for the senior Irish national team until 40 years later when in June 2018, Graham Burke, also a Shamrock Rovers player, scored against the United States. Treacy represented the League of Ireland in a friendly against Argentina in the Boca Junior Stadium in
Keith Treacy with Preston North End on 1 February 2010. Following his move to Preston, Treacy defended his move to Blackburn's arch-rivals, Preston North End, was only for to play football. Treacy made his Preston North End debut on 2 February 2010, in a 4-1 loss against Barnsley. He scored his first goal for the Lancashire outfit in a 3–1 defeat Crystal Palace on 5 April 2010, followed up by scoring and provided an assist, in a 3-2 win over Scunthorpe United five days later. In the second half of the season at Preston North End, Treacy scored twice in seventeen appearance.