Quarterback Marcus Mariota's injury was a huge blow to the hopes of Tennessee Titans fans. Now, fans are wondering when he will be back on the field.

How is Mariota's injury looking? Is backup Zach Mettenberger ready to fill Mariota's shoes for the time being?

Find out in the above video as Bleacher Report NFL Insider Jason Cole goes in-depth on the outlook of Mariota's injury.