Here's a quote from ASB's article at mlive -

In addition to angering Davidson, Wallace also upset some of his teammates, including one who said he was "shocked" that a contract that would make the 31-year-old Wallace the highest-paid player in franchise history apparently wasn't enough to convince him to return to the team he has been an integral part of for the past six seasons. Others, however, understood his position.
It's not Lindsay Hunter because he's quoted in the article understanding Ben Wallaces decision. It's not going to be Acker, Maxiell, Blalock, Johnson because it would be ridiculous even to ask them, Delfino is probably in the same boat.

Who are the remaining suspects - Tay Prince, Rip Hamilton, Chauncey Billups, Rasheed Wallace, Antonio McDyess, and Dale Davis. I can't believe it would be Mr. CTC Rasheed Wallace, and I doubt Billups would make such a comment realizing he'll be in the same boat next off-season. I can't see Tayshaun being upset given his negotiations last season. My two suspects are Antonio McDyess and Rip Hamilton. I could see McDyess saying he is shocked, but not really in a disparraging tone that ASB makes it out to be. Therefore my guess is Rip Hamilton.

Of course saying you're shocked he didn't sign doesn't mean you are really upset. Maybe ASB is playing loose with his words to add drama to the story and toe the company line that Ben Wallace is the bad guy here. Maybe ASB is the bitch.