Which Bears player will end 2019 with the highest Pro Football Focus grade?

Behind Enemy Lines: Chicago Bears at Minnesota Vikings; Week 17The list of underachieving Chicago Bears players in 2019 wouldn't be all that difficult to create. Most would come from the offensive side of the ball. The defense has had its share of player regression too, but it would be unfair to focus only on the negative.

There are a handful of Bears who've done pretty well this year, and while it hasn't shown up in the win column, it hasn't been a completely lost season of player development.

Here are Pro Football Focus' five highest-graded Bears entering Week 17's finale against the Minnesota Vikings.

OLB Khalil Mack (86.5)

Most of the conversation about Mack's 2019 season has been negative.…