The Jags have done it before. We have turned several QB's into Tight Ends. Locker is a far better athlete than any other QB we have turned into a TE and he probably has no shot at being a starting QB in the league.
I could see him dropping to the middle rounds but we have so few picks that it we would have to be really confident that he could convert to the position before taking him. Hopefully, he would be willing to workout as a TE for our scouts sometime.
Anyways I'm just tossing the idea out there.