I think he's a starting PG...
You would think Parker doesn't have much left in the tank so Mills is next in line...
However, the Spurs as great as they are... They will lose Duncan, Parker & Manu probably within the next 2 seasons.
So a rebuild will be on the cards in SA... Will Mills wanna wait a couple of seasons to take over as starting PG of a rebuilding franchise down the road...
Or would it be better for him to jump on a project like the Knicks right away in the hope that in a couple of years time he will be starting PG for a contender.