Complex sentence: Drysdale then moved into non league football and signed for Forest Green Rovers where he played for three years before following departed manager, Frank Gregan, by signing for Welsh Premier League side Aberystwyth Town.
Split into simpler sentences: Drysdale then moved into non-league football and signed for Forest Green Rovers. He played for three years with Forest Green before following departed manager, Frank Gregan, by signing for Welsh Premier League side Aberystwyth Town.