He's the highest-paid defensive player in the history of the league, and the Bears have won zero playoff games since they handed him that contract before the 2018 season.
That isn't Mack's fault, but for that money, you have to be transcendent. He has 21 sacks in 30 games as a Bear, which is good but not great. And the Chicago defense took a big step backward statistically in 2019.
What's most concerning is the 2014 first-round pick wasn't even expensive the last two years. But he'll account for more than $26 million against the cap in each of the next three seasons, with Chicago only able to get out of the third year with a $12 million dead-cap charge. Not ideal considering Mack will be 29 next month.