As Bruins power play struggles, Tomas Kaberle still trying to ‘prove why I’m here’ » Tomas Kaberle

Tomas Kaberle's Bruins tenure has not been a pretty one. (AP)

Tomas Kaberle’s Bruins tenure has not been a pretty one. (AP)

Boston Bruins’ Tomas Kaberle prepares for a face-off during first period NHL hockey action against the Toronto Maple Leafs in Toronto Saturday, March 19, 2011. Kaberle, who played for the Maple Leafs for over a decade, returned to play in Toronto for the first time since being traded to the Boston Bruins. (AP Photo/The Canadian Press, Darren Calabrese)