ðeɪ dˈoʊnt sˈeɪ wɛn hiː ɐdˈɑːptᵻd ðɪs pɹˈæktɪs, bˌʌt ɪts ʌnlˈaɪkli ðæt hiː wʌz dˌuːɪŋ ðɪs sˌoʊ ˈɜːli ɪn hɪz kɚɹˈɪɹ.
They don't say when he adopted this practice, but it's unlikely that he was doing this so early in his career.