The Buffalo Bills have invested heavily along the defensive line in recent years. They’ve used a first-round pick on Greg Rousseau, second-round picks on AJ Epenesa and Boogie Basham, and spent big in free agency on future Hall-of-Fame pass-rusher Von Miller. Most fans would agree that Epenesa and Basham have underperformed, and Miller getting hurt in Detroit last season was a huge blow, but the one constant for head coach Sean McDermott along the DL has been ‘Groot.’ Before we dive deeper into Rousseau as an individual, I want to remind everyone that the Buffalo defense has been pretty solid, as a whole. They finished second in points per game allowed at 17.9 and sixth in yards per game against 319.1. They finished fourth in Football Outsiders’ DVOA (Defense-adjusted Value Over Average). A third-year growth track from Groot will only help those team numbers. McDermott, now the play caller, will also need to lean on Rousseau as a leader of the EDGE room while Miller continues to recover from the ACL injury he suffered last season. This is why the Miami product earned 25 of 60 possible points from our Cover 1 Crew, with @LowBuffa ranking him the highest at…