FILE -- IN an April 12, 2012 file photo former Toronto Maple Leafs captain Rick Vaive adjusts his tie as he enters a courthouse in Newmarket, Ontario. Ten former National Hockey League players, including former Toronto Maple Leafs' captain Vaive, claimed in a class-action lawsuit that the league hasn't done enough to protect players from concussions. (AP Photo/The Canadian Press, Michelle Siu, file)Three months after the NFL agreed on a $765 million agreement with hundreds of ex-gamers for concussion-associated well being problems, a group of their NHL friends goes to courtroom, too.