Gregory Campbell probably doesn’t know it yet, but his life has been completely, inalterably changed. No matter where his hockey travels take him, be they as a player, coach, broadcaster or front-office suit, he is always going to be The Guy Who Played With the Broken Leg. He is always going to be a symbol of this Bruins season, a symbol of toughness, of blue-collar values, of putting team ahead of self. Now and forever, any member of the Bruins who makes the athletic equivalent of a one-man charge up San Juan Hill will inspire teammates, fans and pundits to dredge up the story about what Gregory Campbell did in the spring of 2013. Heck, it won’t just be the Bruins. It’ll be the same with the Red Sox, Celtics and Patriots, because the Guy Who Played With the Broken Leg isn’t just a hockey story. In the years ahead, it’s possible the story will even be utilized as a warning to slow down, with the concerned coach telling that one crazy, overzealous player, “Look, don’t try to be Gregory Campbell out there.” It was on the night of Wednesday, June 4, 2013, that Campbell made the cosmic leap from Bruins player to central player in Boston sports history. With the B’s trying to kill off a Pittsburgh Penguins power play, Campbell went down on the ice to block an Evgeni Malkin shot, suffering a broken right fibula. Had Campbell remained on the icy canvas, writhing in pain, it would have been a nice playoff story but one that would have dissipated by the time coach Claude Julien emptied out the puck bucket for the start of next season’s training camp. But the reason we will be talking about this play for, oh, I don’t know, forever, is because Campbell, though clearly in great pain, managed to lift himself up and wander around the rink, trying to help kill the power play. That was Campbell’s last public appearance until yesterday, when he spoke to the media for the first time since suffering the sea