Chara was pissed that Hosea, a fellow countryman, signed and then traded.
Chara’s lack of speed was exposed in the playoffs, when teams dumped the puck into his corner, and retrieved it, knowing he had difficulty turning and acquiring possession of the puck…. Remember this was the season after they modified the rules, and started to crackdown on clutching and grabbing, which at the time, was Chara’s forte.
Management informed both Redden and Chara they wanted them both back, at the same AAV, and Redden immediately signed. Chara did not, as he wanted out, and to grease the skids, he demanded management remove the Captaincy from the Captain at time, and give it him before he would accept the same contract offers to himself and Redden.
At the split second he became an UFA, his agent announced the 5 year deal with the Bruins, which if I remember correctly included the Captaincy.
So there was NO Choice for the Sens to make, Chara wanted out, and he got out.