Rams pretty sure Tyler Higbee tore his ACL on the low hit. Some say dirty. Those people are morons.
You go high? Fine, penalty, and you're a dirty player.
Go low to avoid penalty and a guy gets injured? You're a dirty player.
Congratulations NFL, you caused this with your bullsh*t constant rules favoring offensive players.
I am old enough to remember the story of Larry Fitzgerald telling Defensive backs when he will pay their fines but do not hit him in the knees.