aʊtsˈaɪd ʌv hɪz pɑːɹtˈɪsɪpˈeɪʃən æt ðɪ ˌɪndiənˈæpəlˌɪs mˈoʊɾɚ spˈiːdweɪ, ˈeɪtkən ɪz nˈoʊn tə hæv stˈɑːɹɾᵻd æt lˈiːst θˈɜːɾi θɹˈiː ˌeɪˌeɪˈeɪsˈæŋkʃənd ɹˈeɪsᵻz, fɹʌm nˈaɪntiːnhˈʌndɹɪd sˈɛvən tə nˈaɪntiːnhˈʌndɹɪd sˈɪkstiːn, ænd tə hæv dɹˈɪvən ɹᵻlˈiːf ɪn æt lˈiːst θɹˈiː ˈʌðɚz.
Outside of his participation at the Indianapolis Motor Speedway, Aitken is known to have started at least 33 AAA-sanctioned races, from 1907 to 1916, and to have driven relief in at least three others.