Originally Posted by Hoosier Red
Depending on the reasoning, he may technically be a senior. For instance, medical redshirts are considered to be part of their class until after they've exhausted their eligibility. They then petition for an additional year. It's almost always granted, but until they do that, they're technically Seniors.
It's my understanding that medical redshirts refer to wiping out a player's season of eligibility after they've played in a few games (but under 30%). Then they have to apply. Since Luck didn't play at all his first year, no petition will be necessary in order for him to be eligible to come back for his senior season.
I believe that all NCAA athletes have 5 yrs to complete four years of eligibilty. Thus Luck is a senior academically (but who cares about that if you're a football fan) but a junior athletically