Was Dolphins Olivier Vernon low hit on Titans Marcus Mariota dirty?

[Fabbs]

https://search.yahoo.com/search?p=video+olivier+vernon+on+Mariota&fr=uh3_sports_web&fr2=p%3Asprt%2Cm%3Asb

Mariota out 1 -6 weeks.

To me, all in all Mariota was having a good rookie year on a sucky Titans team.