Lisa Degelman's younger brother died earlier this year, and in her heart, she believes she knows what the cause was. 

"It was concussions," she said, "and their effect on his brain."

Rob Trumbley, originally from Regina, was a former enforcer who played for WHL's Moose Jaw Warriors and was a draft pick for the Vancouver Canucks. He died at the age of 50 on Jan. 13, and his sister says he died by suicide.

Degelman said that he spent his adult life playing hard, fighting often and battling the invis…