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 his Barnsley's career went bad after needing rehabilitation. Treacy then scored his first Barnsley goal on 22 November 2014, in a 2-1 loss against Chesterfield. However, just six months into his contract, he left Barnsley by mutual consent in January 2015, after he had made 16 appearances. Treacy returned to Ireland and joined struggling Premier Division side Drogheda United midway through the season. His two goals in eight games was not enough to help his side avoid being relegated on the final day of the season, and he left the club to sign for another Premier Division side, St Patrick's