The NFL's best position groups

Evaluating the worst 2018 NFL offseasons (1:46)

Dan Graziano, Field Yates and Darren Woodson explain why the Seahawks, Bills and Dolphins respectively have had the worst offseasons so far. (1:46)

All the heavy lifting of NFL roster-building is done.

With the draft and free agency over, let's take a look at the best position groups throughout the league using the data and grading from the Pro Football Focus database.

Note: This uses information from PFF's analytics department that focuses heavily on the passing game over the running game as it relates to positions that do both.

Quarterback: New England Patriots

Depth chart: Tom Brady, Brian Hoyer, Danny Etling

Nick Foles channeled the spirit of Joe Montana in the two most important games of the Philadelphia Eagles' 2017 season, but most teams are treading water when their starter goes down. There's typically such a big drop-off in quality between a team's starter and the player holding his clipboard that this position group is often all about the quality of the guy under center. Tom Brady remains the gold standard here for that reason, coming off a 95.5 overall PFF grade, leading the league for the second straight season. He was even better the year before (98.0), and while there are players who are capable of matching Brady in their best seasons, none has been able to replicate what he has done over the past few seasons combined -- with Father Time knocking at his door. Last season, he had the third-best big-time throw percentage (PFF's highest-graded passes) and the fifth-best turnover-worthy play rate, ranking in the top three in both grade from a clean pocket and when under pressure.