Jeffrey guided Ballymena to winning the Northern Irish League cup in 2016–17 season and took them to the quarter-finals of the Irish Cup and a 4th place finish in the league.
dʒˈɛfɹi ɡˈaɪdᵻd bˌælɪmˈiːnə tə wˈɪnɪŋ ðə nˈɔːɹðɚn ˈaɪɹɪʃ lˈiːɡ kˈʌp ɪn tˈuː θˈaʊzənd sˈɪkstiːn sˈɛvəntˌiːn sˈiːzən ænd tˈʊk ðˌɛm tə ðə kwˈɔːɹɾɚfˈaɪnəlz ʌvðɪ ˈaɪɹɪʃ kˈʌp ænd ɐ fˈoːɹθ plˈeɪs fˈɪnɪʃ ɪnðə lˈiːɡ.