Martindale’s signature was heavy, aggressive blitzing with man coverage. At Michigan, Macdonald transitioned the defense from former defensive coordinator Don Brown’s man-heavy system to what was essentially a simpler version of Nick Saban’s and Kirby Smart’s man-match-heavy system, and as the season progressed, he added his own twists to it. However, he isn’t married to a particular scheme, and he has collaborated with the Ravens’ staff to develop a system that fits the strength of the players on the roster. Macdonald’s flexibility is likely one of the reasons he was chosen to replace Martindale, who stubbornly stuck with his aggressive scheme despite not having enough healthy corners to cover man-to-man at a high rate last season.