Two lost years already. He could be in AAA right now if he'd been healthy the last two years, but at least AA and getting close to AAA. If he is finally healthy, and productive, he'll top out at AAA this year if everything goes great, but I'm guessing he's in AA all year and maybe plays in the AAA playoffs (if there are any for the Saints).
The questions are: can he stay healthy? If he does, will the Twins aggressively promote him if he's great?