That would mean he rushed for 1600+ yards, close to 15 TDs, and put MSU literally on his back to go 7-5 and to a bowl game (at 5-3 in the SEC, possibly New Years Day type bowl). He'd probably finish #3 in the nation (at worst) in rushing. Honestly, even doing all of that I don't think he'd get invited. But in a year with no clear cut favorite, he would deserve an invite.
Edit:
Here's my prediction of who gets invites to the Downtown Athletic Club:
Keenum (as long as Houston wins out and wins CUSA, and continues to put up monster numbers)
Clausen (assuming ND doesn't have a complete collapse)
Ingram (will continue to be the workhorse for the Tide all the way to the SECCG)