bɪkˈʌz ʌv ðiːz nˈuːmɚɹəs sˈʌbsᵻkwənt ɹˈuːl tʃˈeɪndʒᵻz, pˈɪtʃɪŋ ɹˈɛkɚdz fɹʌm ðæt ˈiəɹə ɑːɹ nˌɑːt əfˈɪʃəli kəmpˈɛɹd tə ðoʊz ʌvðə mˈɑːdɚn ˈiəɹə, wˌɪtʃ ɪz vˈɛɹiəsli ɹᵻɡˈɑːɹdᵻd æz bɪɡˈɪnɪŋ ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd nˈaɪnti θɹˈiː wɛn ðə mˈɑːdɚn pˈɪtʃɪŋ dˈɪstəns wʌz ɪstˈæblɪʃt ɔːɹ nˈaɪntiːnhˈʌndɹɪd wˈʌn.
Because of these numerous subsequent rule changes, pitching records from that era are not officially compared to those of the modern era, which is variously regarded as beginning in 1893 (when the modern pitching distance was established) or 1901.