Career
A product of Drumcondra F.C., Clarke played for his country at youth level against England in 1938. Shortly after he joined Shamrock Rovers where he spent 12 seasons as a defender. However he joined Rovers as a striker and scored a hat-trick in one of his first games for the club
He played nine times for the League of Ireland XI while at Glenmalure Park.
In the 1950/51 season Mattie was awarded a testimonial for his twelve years service at Milltown. He then moved to He signed for Waterford United in August 1954.
