Fantasy Talk: Marcus Mariota, Worth a Starting Quarterback Spot?

Based on what we've seen from Marcus Mariota through the preseason and week one, is he worth the starting quarterback spot on your fantasy team?

Change was bound to happen once the first week of football was finished up. Who are the biggest risers after Week 1? Who are the biggest fallers?
Fantasy football owners may welll be wishing they had taken a gamble on a rookie or two. The rookie class of 2015 will be closely watched.
Cold Hard Football Facts -- Tennessee rookie quarterback Marcus Mariota wowed the NFL in his Week 1 debut, with a proverbial “perfect” passing performance of 158.3. His "uncapped" rating of 207.5 stands among the best all time.