McCreadie played with Derry City F.C. and scored the club's first ever goal in the League of Ireland in 1985 He joined Omagh Town managed by his Brother Roy and made an immediate impact, his scoring prowess made Barry a hit with the Omagh Town support. He played with Town in both the Premier league and first division but a long term back problem forced him out of the game. One of Omagh Towns best loved players. Omagh went out off football in 2005. Barry was also a cult figure at Bangor FC between 1991-1994 and won an Irish cups winners medal in 1993 in the Final against Ards.