ɪn tˈuː θˈaʊzənd θɹˈiː, ˈændɚsən tɹˈævəld tə ðə juːnˈaɪɾᵻd stˈeɪts tə kəmpˈiːt ɪnðɪ ˌeɪˌɛmˈeɪ wˈʌnhˈʌndɹɪd twˈɛnti fˈaɪv sˌiːsˈiː nˈæʃənəl tʃˈæmpiənʃˌɪp fɚðə jˈɑːməhˌɑː ʌv tɹˈɔɪ tˈiːm, hiː fˈɪnɪʃt ðə jˈɪɹ ɪn sˈɛvənθ plˈeɪs ˌoʊvɚɹˈɔːl ænd kəlˈɛktᵻd wˈʌn wˈɪn æt sˈaʊθwɪk, mˌæsɐtʃˈuːsɪts.
In 2003, Anderson travelled to the United States to compete in the AMA 125cc national championship for the Yamaha of Troy team, he finished the year in seventh place overall and collected one win at Southwick, Massachusetts.