He missed Dublin's win in the 1922 All-Ireland final (played 7 October 1923) as by then he was interned in the Curragh Camp. Major General Tom Ennis of the National Army, a former teammate of Stynes who took the pro-Treaty side, secured Stynes' availability for subsequent Dublin matches, and he got a winner's medal for the 1923 final (played 28 September 1924), in which he scored the final two points.
He was unable to attend Dublin's triumph in the 1922 All-Ireland championship game (played on October 7, 1923) due to his imprisonment at the Curragh Camp. Major General Tom Ennis of the National Army, a former teammate and supporter of Stynes who sided with the pro-Treaty faction, facilitated Stynes' participation in subsequent Dublin contests, and he received a winner's medal for the 1924 championship game (played on September 28, 1924), in which he scored the final two points.