claim: Manchester United F.C. was never the world's highest-earning football club.
evidence: Herbert Butterworth -LRB- September quarter 1902 -- March quarter 1938 -RRB- was an English professional footballer who played as a left half .. footballer. association football. left half. left half. He played nine matches in the Football League for Nelson and also assisted several non-league clubs .. Nelson. Nelson F.C.. the Football League. the Football League. In 1929 , he emigrated to Canada , but returned to England several years later .