Stacey made his Manchester United debut on 12 October 1907, playing at left back in a 6–1 away win over Newcastle United. That season, he made 18 league appearances and scored one goal as United won the First Division title by nine points over Aston Villa - the first major trophy in Manchester United's history.
Stacey's Manchester United debut occurred on October 12, 1907, when he played at left back in a 6-1 win against Newcastle. He made 18 league appearances that season and scored one goal as United secured the First Division title by nine points over Aston Villa, kickstarting their trophy collection.