'Secondary coach Leslie Frazier, who was instrumental in the improvement of the team's defensive backfield in 2016, will also depart and become McDermott's defensive coordinator in Buffalo. In his one season with the Ravens, Frazier's impact was felt as the team tied for the league lead with 18 interceptions, more than they had the previous two years combined, and finished with the NFL's ninth-ranked pass defense. ESPN first reported Frazier's departure.'