In an offseason when their coaching staff has been raided by NFL teams, the Lions are about to lose an important member of their front office to a college team.

Mike Martin, who reportedly will be Notre Dame’s new football GM, spent two decades in the NFL, including helping build the current Detroit Lions roster.

Notre Dame is finalizing a deal to hire Detroit Lions Director of Scouting Advancement Mike Martin as the school’s new general manager, per source. Martin was part of Detroit’s initial front office staff that helped rebuild the Lions’ roster. Now Notre Dame HC Marcus Freeman is…