Waxad ku qortaa sii wadida cutubkan - Red Sox waa mid kamid ah kooxaha ugu guulaha badan kubada kolayga laga soo bilaabo 1901 ilaa 1918. Waxay ku guuleysteen Taxanaha Adduunka ee ugu horreeya (sida Boston Americans; kooxdu waxay magaceeda u beddeshay Red Sox sanadkii 1908) iyo afar kale inta u dhaxaysa iyo. Sanadkii 1901, Yankees, oo markaa loo yaqaanay Baltimore Orioles, waxay ka ciyaareen Maryland laba xilli ciyaareed ka hor inta aysan u dhaqaaqin waqooyiga. Labada kooxood waxay kulankoodii ugu horreeyay ku yeesheen Baltimore bishii Abriil 26, 1901, sannadkii ugu horreeyay ee Horyaalka Mareykanka. 7-dii Maajo, 1903, labada kooxoodba waxay ciyaareen markii ugu horreysay ka dib markii Orioles ay u guureen New York waxayna noqdeen New York Highlanders, iyagoo tixraacaya ciyaaraha ka dhacaya xaafadda Washington Heights ee Manhattan. Ciyaarta waxaa lagu calaamadeeyay dagaal markii uu kubbada dhaliyaha Boston George Winter uu hoos u dhacay. Boston ayaa ugu danbeyn ku guuleysatay horyaalka iyo horyaalkii ugu horeeyay ee World Series 1903
Waxaad Xilli ciyaareedkii 1904 waxaa lagu soo bandhigay kooxaha oo is hor fadhiya maalinta furitaanka. Xilli ciyaareedkii dambe, Highlanders, oo uu hogaaminayo Jack Chesbro xilli ciyaareedkiisii rikoodhka ahaa ee 41 ciyaarood ee uu ku guuleystay, ayaa la kulmay Boston Americans ciyaartii ugu dambeysay ee xilli ciyaareedka si loo go'aamiyo guusha horyaalka American League. Chesbro ayaa dhaliyay kubad cajiib ah qeybtii sagaalaad, taasoo u ogolaatay orodka guusha inuu ka dhaliyo saldhigga saddexaad, Boston ayaana ku guuleysatay ciyaarta, iyo horyaalka. New York Giants, oo horey u qabsaday National League pennant, ayaa diiday inay ka ciyaaraan 1904 World Series sababtoo ah aragtida "Junior Circuit" oo ah mid hoose (iyo sababtoo ah cadaawad la sheegay oo u dhexeysa aasaasaha American League iyo madaxweynihii ugu horreeyay, Ban Johnson, iyo kala sarraynta Giants, milkiilaha John T. Brush iyo tababaraha Hall of Fame ee kooxdiisa, macalinka ciyaaryahanka-macalinka John McGraw); sidaas darteed, ma jirin World Series sannadkaas. Ilaa 2004 Red Sox mar kale waxay ka adkaadeen Yankees ciyaar ay ku go'aamiyeen horyaalka.