 He couldn't prevent Sunderland being relegated but played a major role in 1987–88 which saw the Black Cats win the Third Division title.Bertschin ended his professional career at Walsall, Chester City and Aldershot before dropping into non-league football.Bertschin played for Solihull Borough, Evesham United and was a member of the Barry Town team which won the Welsh Cup in 1994 with a 2–1 victory against Cardiff City.