FA: JaVale McGee 3yrs/$17.2M to DAL | will indeed start at center

[F Gump]

The kind of wing we want doesn't grow on trees. Signing McGee addressed a need for now. During the regular season Josh Green is probably to have a slightly bigger role and if he keeps improving we may not have to look elsewhere for that extra wing, and he's already shown some flashes of playmaking ability too. The McGee signing signals to me a vote of confidence in Josh Green to keep improving

I think you're right about the possibilities for Green -- and you could also be ahead of the curve on their planning. It does take some time for young players to get there, even with the most optimal circumstances.