By Zach Barnett Six days after scoring one of the biggest wins in school history, offensive line coach Eddy Morrissey has reportedly left Marshall’s staff. Marshall offensive line coach Eddy Morrissey has resigned, Paul Swann of ESPN941 in Huntington, W. Va., reported Friday. A source has confirmed the news to FootballScoop. Sources said the move was for personal reasons and not related to due to on-field performance. The move comes six days after the Thundering Herd scored one of the biggest victories in school history, a 26-21 win at No. 8 Notre Dame, and a day before the Herd visits Bowling…