bˈɔːɹn ɪn pˈɛdɹælbz, bˌɑːɹsɪlˈoʊnə, kˌæɾɐlˈoʊniə, ɹᵻksˈætʃ mˌeɪd hɪz sˈiːnjɚ deɪbjˈuː fɔːɹ ˌɛfsˈiː bˌɑːɹsɪlˈoʊnə ˌɔn twˈɛnti fˈaɪv ˈeɪpɹəl nˈaɪntiːnhˈʌndɹɪd sˈɪksti fˈaɪv ˈæftɚ hˌævɪŋ dʒˈɔɪnd ðɛɹ jˈuːθ sˈɪstəm æz ɐ twˈɛlvjˈɪɹˈoʊld, skˈoːɹɪŋ wˈʌns ɪn ɐ fˈoːɹ zˈiəɹoʊ ɐwˈeɪ wˈɪn ɐɡˈɛnst ɹˈeɪsɪŋ də sˈæntændɚ fɚðə kˈoʊpə dˈɛl dʒˌɛnɚɹˌælɪsˈɪmoʊ.
Born in Pedralbes, Barcelona, Catalonia, Rexach made his senior debut for FC Barcelona on 25 April 1965 after having joined their youth system as a 12-year-old, scoring once in a 4–0 away win against Racing de Santander for the Copa del Generalísimo.