Curtis had previously played in all five matches en route to the club reaching the 1927 FA Cup Final but his injury meant he was unlikely to play in the final. However Harry Wake, who had replaced Curtis in the semi-final, suffered an injury in a league match two weeks before the final which ruled him out. Billy Thirlaway, who had covered Curtis' absence in the league, was also ruled out as he was cup-tied for the game having played in the earlier rounds of the competition for his former club. Curtis was therefore brought back into the starting lineup for the final, becoming the youngest ever player to have appeared in an FA Cup final at the age of 19 years and 317 days. Cardiff went on to beat Arsenal 1–0 in the final to become the only team from outside England to win the competition as of 2021. He also helped the club win the Welsh Cup in his first season, defeating Rhyl 2–0 in the final.