Alongside Roy Coyle, Jeffrey is Linfield's most successful manager in history, having won 31 trophies during his 17-year tenure.
ɐlˈɔŋsaɪd ɹˈɔɪ kˈɔɪl, dʒˈɛfɹi ɪz lˈɪnfiːldz mˈoʊst səksˈɛsfəl mˈænɪdʒɚɹ ɪn hˈɪstɚɹi, hˌævɪŋ wˈʌn θˈɜːɾi wˈʌn tɹˈoʊfiz dˈʊɹɹɪŋ hɪz sˈɛvəntˌiːnjˈɪɹ tˈɛnjɚ.