Kammala wannan magana: Bayan kusan shekaru ashirin na wasan ƙwallon ƙafa na matsakaici, dukiyar Pirates ta fara canzawa a farkon karni na 20. Pirates sun sami 'yan wasa da yawa daga Louisville Colonels, waɗanda aka tsara don kawar da su lokacin da N.L. ta yi kwangila daga ƙungiyoyi 12 zuwa 8. (Ƙungiyoyin ba su haɗu da juna ba; 'yan wasan da aka samu sun kasance ma'amaloli daban-daban.) Daga cikin waɗannan 'yan wasan akwai Honus Wagner, wanda zai zama ɗaya daga cikin' yan wasan farko da aka shigar da su cikin Hall of Fame na Baseball. Pirates sun kasance daga cikin mafi kyawun ƙungiyoyi a cikin wasan baseball a farkon 1900s, sun lashe lambobin National League guda uku a jere daga 1901 zuwa 1903 kuma sun shiga cikin
da farko na zamani World Series taba taka leda, wanda suka rasa zuwa Boston. Pirates sun koma gasar cin kofin duniya a 1909, inda suka doke Detroit Tigers a karon farko. A wannan shekarar, Pirates sun ƙaura daga Exposition Park zuwa ɗaya daga cikin filayen wasan ƙwallon ƙafa na farko, Forbes Field.