Ken Whisenhunt: Marcus Mariota had MRI and he has a sprained MCL. (Jim Wyatt on Twitter)
Nerdy Football Analysis: The No. 2 overall pick did not miss a snap until he was pulled late in blowout loss to the Dolphins after Miami DL Olivier Vernon went low on him on a first-half hit. Since MCL sprains are typically multi-week injuries, Zach Mettenberger figures to get a start next week at home against Atlanta and possibly in Week 8 at Houston.