In May 2008 , he signed a professional contract with Drogheda United .
Clarke made his Drogheda United senior debut in May 2007 in a 3 - 0 League of Ireland Cup defeat to Shamrock Rovers .
In May 2008 , Clarke signed a professional contract with Drogheda United .
Clarke made his Drogheda United senior debut in May 2007 in a 3 - 0 League of Ireland Cup defeat to Shamrock Rovers .