THE CRUCIFIX: Cato: Wood isn't thrilled w/ his role...Will depart in the summer

[F Gump]

That may well be their opinion, and in my view this is how you lose him for nothing. I see no reason for Wood to accept a 2 year tryout when this season was supposed to be the tryout. Might as well hit free agency if the organization doesn't believe in you. 
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You may be right in your analysis of the Mavs' negotiating stance - there's no question they tend to suck at both evaluating and negotiating.

But we don't know the whole story either. 
1 We can imagine Wood should be thinking X or Y, but he might not.
2 Wood coming in and "proving" something in a contract year is a classic thing GMs don't like to pay for -- if paying for several years, they want him dialed in EVERY year, not just for the last year of a contract. If he's only going to be focused when a new deal is shortly ahead, you only want to pay him shorter length deal. 

We can say he's this or that, but once again, there's plenty of reason to wonder if his demand is all that high around the league. And if not, it's stupid to negotiate against yourself. We assume Mavs simply MUST pay an arm and a leg, but if he was on a diff team, our perception might be very different.