Bruce Cassidy believes Tuukka Rask will be 'ready to go' this postseason

By Ty Anderson, 985TheSportsHub.com A 16-of-21 performance in a 6-3 loss is not how Bruins netminder Tuukka Rask wanted to end his regular season. That fifth goal surrendered on Saturday, a weak wrister from Lightning defenseman Braydon Coburn, was especially heinous. But Bruins coach Bruce Cassidy isn't about to lose faith in Rask entering the…