To be honest I seriously doubt Terry is one of the guys with a lack of caring.
Terry has always come across as very passionate about winning - his championship tatoo's and his historical tendancy to come up big in important games but hint at this. So far statistically he's been one of the top 4 players on the team. Doc has commented on how much he has loved Terry's defense, and the fact that he's kept him in the starting lineup (despite him usually being at his best as a 6th man) speaks volumes of Doc's faith in Terry.
He may be struggling with his shot, but I rarely see Terry with an emotionally look on his face when his team is down. After a loss also he always accepts responsiblility and always says the right things.
Likewise Wilcox - he looks serious every time I see him, and whie he may not be the perfect player he plays HARD every time he is on the court.
Same with Sullinger as well. The other night against Golden stat that guys face was red from fury when the team was down and he wasn't getting calls.
Personally I think it's Bass, Barbosa, Lee and possibly Green.
Bass was a pure energy guy last season, but ever since he got a new contact and his starting spot dissapeared it seems his interest has taken a nose dive. He doesn't play as hard, and his body language just suggests he's "just doing his job".
Barbosa has no shortage of comedic youtube videos out there, so wouldn't surprise me if he's joking around after losses.
Lee never looks to me like he's that into a game emotionally. Very much a 'poker face' type of player, a lot like Bass. His whole body language suggests he's just there to do a job and go home.
Take a look at the roster rotations and I think it tells you all you need to know. Doc initially signed Lee with the intention of starting him until Bradley returns, yet Lee has been coming off the bench the majority of the season. Why do you think that is? Doc appreciates guys who play hard and leave it all on the line, and Lee's inconsistent play may not be the only reason for him losing his starting spot.
Bass was a starter all of last season for Boston, and with him as a starter we went all the way to the ECF where we almost knocked off the eventual champions. He was in the starting lineup nmost of this season where he had been relatively ineffective and inconsistent - suddenly he's been riding the pine lately, and Sullinger is playing almost twice as many minutes as Bass is. Add to this Bass' comments earlier in the season suggesting his discomfort with the bench role, and that's about all you need to know.
Green, I'm not so sure. He's a quiet guy with a 'nice guy' persona, and he does sometimes play passive out there...but at the same time if you look at the times times where he flicks the switch he does really get in to the game emotionally. Lately his defense and his rebounding have improved, and those are hustle stats that usually come as a direct result of effort level. I don't think he's got the same level of emotional drive as Rondo, Pierce, Terry and Garnett but I do think he cares about the team and how they go. Especailly after they supported him through his medical issues, he really does seem appreciative of the team.
Personally I feel like Lee and Bass are the most emotionally disconnected right now. At least that's the vibe I get from them.
Possibly Barbosa as well, but Barbosa comes across to me as a guy who DOES care, but who just has a lighthearted way of dealing with things.