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.
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.