John Kosko breaks down the prototype NFL defender for each different scheme's position in the secondary.

Examining the top five inside linebackers from 2017 in each of our major PFF Signature Statistic categories at the position.

PFF Analyst Mark Chichester highlights 2017's best offensive lines based on PFF's pass-blocking efficiency measurement.

Sam Monson breaks down the prototype NFL defender for each D-line technique.

PFF examines the league's top offensive linemen per position, based on run-block success percentage.

PFF data scientists Eric Eager and George Chahrouri provide an in-depth look at whether pressure is more valuable when it is generated from the interior or the edge.

Senior Analyst Gordon McGuinness breaks down various teams' speed to apply pressure in 2017.

Senior Analyst Mike Renner examines why defenses run stunts on the defensive line and who utilized them the best to get pressure on opposing quarterbacks last season.

PFF examines the league's top offensive linemen per position, based on pass-blocking efficiency.

Senior Analyst Gordon McGuinness takes a look at the frequency at which NFL teams blitzed on each passing down in 2017.

Senior Analyst Gordon McGuinness examines the offseason offensive overhaul the Baltimore Ravens completed this spring, including the return of one of the league's top players in Yanda.

Tom Brady was selected No. 2 on the PFF 50, ahead of Aaron Rodgers, Matt Ryan, Drew Brees & Russell Wilson as the others who found their spots among the league's top 50 players heading into 2018.

Cleveland completed the overhaul of their backfield, signing RB Duke Johnson to a three-year contract extension after drafting Nick Chubb and bringing in Carlos Hyde from San Francisco.

Jalen Ramsey and Joey Bosa are two of the NFL's top young talents, with both players earning elite grades in 2017.

Senior Analyst Mike Renner checks in on the Philadelphia Eagles defensive line and it's anchors, both of whom were selected to the PFF 50 top players in 2018 list.

PFF Analyst Rob Hamilton takes a look at just where exactly Derek Carr struggled in 2017 and why there's hope for 2018.

Marshon Lattimore had an excellent rookie year. PFF's Billy Moy examines where he was most successful during the 2017 NFL season.

Bakhtiari has steadily increased his pass-blocking efficiency since his entrance into the league in 2014.