The track record of Belichick's coaching tree has been characterized as poor. Former assistant coaches under Belichick had a combined 208–296–1 () record as head coaches of their own teams through November 28, 2020, and a number of them ended their brief tenures as head coaches by being fired midseason. As of the end of the 2020 season, the only members of this coaching tree to have career NFL head coaching records above .500 were former coaches Groh (9-7) and O'Brien (52-48 during season, 2-4 in playoffs), and current coach Vrabel (29-19 during season, 2-2 in playoffs).