(New Orleans, LA)  --  Marcus Mariota is in line to start for the Tennessee Titans on Sunday when they visit the New Orleans Saints.  The rookie signal-caller has missed the past two games due to a knee injury.  He was a full participant in Wednesday's practice.  Mariota has thrown for just over 12-hundred yards and nine touchdowns in his first pro season after winning the Heisman Trophy while at Oregon last year.