You really think that there's going to be any kind of significant platoon between the two over the next four years?
Tim Thomas is making $6 million the next two seasons, he's the starting goaltender. Rask will not get the playing time he needs to continue his development during the duration of this contract.
It's not only the goaltending costs. How are the Bruins going to afford to re-sign Kessel, Krejci, and guys like Axe, Hunwick, and Bitz, all of whom have provided excellent depth for the Bruins this season?
No matter how you slice it, giving a soon to be 35 year old goaltender $6 million is a truly awful deal and it's very likely this contract could have cost the Bruins their franchise goaltender.