He played at representative level for Great Britain, England and Lancashire, and at club level for Broughton Rangers/Belle Vue Rangers, Oldham RLFC (World War II guest), Huddersfield (World War II guest), St Helens and Warrington, with whom he won the 1953–54 Challenge Cup, as a wing.
[9] Stan McCormick played in Warrington's 8-7 victory over Halifax the Championship Final during the 1953–54 season at Maine Road, Manchester on Saturday 8 May 1954, in front of a crowd of 36,519.
McCormick played on the wing in St. Helens' 10–15 defeat by Huddersfield in the 1953 Challenge Cup Final during the 1952–53 season at Wembley Stadium, London on Saturday 25 April 1953,[10] played wing in Warrington's 4–4 draw with Halifax in the 1954 Challenge Cup Final during the 1953–54 season at Wembley Stadium, London on Saturday 24 April 1954, in front of a crowd of 81,841, and played on the wing in the 8-4 victory over Halifax in the 1954 Challenge Cup Final replay during the 1953–54 season at Odsal Stadium, Bradford on Wednesday 5 May 1954, in front of a record crowd of 102,575 or more.
[11] McCormick played at centre in Belle Vue Rangers' 7-10 defeat by Wigan in the 1947 Lancashire Cup Final during the 1947–48 season at Station Road, Swinton on Saturday 1 November 1947,[12] played on the wing in St. Helens' 5-22 defeat by Leigh in the 1952 Lancashire Cup Final during the 1952–53 season at Station Road, Swinton on Saturday 29 November 1952, and played on the wing in the 16-8 victory over Wigan in the 1953 Lancashire Cup Final during the 1953–54 season at Station Road, Swinton on Saturday 24 October 1953.
In January 1949, McCormick joined St. Helens from Belle Vue Rangers for a record fee of £4,000 (based on increases in average earnings, this would be approximately £329,600 in 2014),[13][1] he later went on to play for Warrington.