Kammala jumla mai zuwa: Wanda tsohon dan wasan Colonels Honus Wagner (wanda aka haife shi kuma ya girma a yankin Pittsburgh) da kuma dan wasa / manajan Fred Clarke suka karfafa, Pirates sun mamaye National League gaba daya, a wani bangare saboda sun rasa 'yan taurari' yan wasa zuwa gasar zakarun Amurka. Duk da haka, saboda raunin da ya faru da su na farawa, sun rasa
na farko na zamani World Series taba buga, a 1903, zuwa Boston. Deacon Phillippe ya buga wasanni biyar cikakke, ya ci uku daga cikinsu, amma bai isa ba. Tare da yawancin 'yan wasan taurari iri ɗaya, Pirates za su ci gaba da kasancewa babbar ƙungiya a cikin' yan shekaru masu zuwa, kuma sun sami taken World Series na farko a 1909, inda suka ci Detroit Tigers a wasanni bakwai. A wannan shekarar, kulob din ya buɗe filin Forbes, wanda zai zama filin wasan sa na shekaru 61 masu zuwa.