He played forward at first, even though his hero was a goalie, Grant Fuhr. His parents wanted him to get exercise, and they thought goalies, well, didn't. At 11 or 12, he was cut from a travel team, and when the goalie on his house team got sick, his mother relented and allowed him in net.
"I got a shutout that game, and I never went back," he said.
By 15, Luongo played for Montreal-Bourassa, the same team that produced NHL goalies like Brodeur, Felix Potvin and Stephane Fiset. The legendary goalie guru Francois Allaire saw him for the first time. Though not yet his eventual 6-foot-3, 215 pounds, Luongo already was big in net.
"He was doing a lot of stuff like a young kid," said Allaire, who would go on to work with Luongo for much of his career. "But you could see his size, and his butterfly was really wide. His glove was already one of his trademarks."
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Luongo was selected by the New York Islanders with the No. 4 pick in the 1997 NHL Draft. He was the first goalie picked in top five since the Montreal Canadiens chose Michel Plasse with the No. 1 pick of the 1968 NHL Draft.
Luongo dealt with the highest expectations throughout his career, externally and internally.
"Roberto was nervous," Allaire said. "He was nervous even in preseason games. He wants to be good. He wants to show his teammates he's the No. 1 guy. He's the guy who wants to win for his team. That's something inside his personality."
After one season with the Islanders and five with the Panthers, Luongo reached his peak with the Canucks from 2006-14.
Former Canucks defenseman Kevin Bieksa said Luongo was probably the most competitive player on the team when he arrived.
"He was so good that, honestly, I don't think he got scored on in practice for the first two years," Bieksa said. "You couldn't score on him because he cared about every single shot."
Luongo was the Canucks captain from 2008-10. He is the only goalie to serve as a captain in the NHL since Bill Durnan did it with the Canadiens in 1947-48.
"A lot of goalies sometimes are afraid to play, but this guy, I played with him at the Olympics," said Brodeur, who lost the No. 1 job for Canada to Luongo in 2010. "He wanted to take my net away, and he did eventually. That's the reason why you're that good for that long, because you're a competitor and you want to be in there. You're not shying away from anything."
Over time, perhaps as a pressure valve, Luongo displayed more of his funny, self-deprecating side. His quick wit made him a star on Twitter. But his competitive fire kept burning.
"He could find a balance between keeping it loose and being focused, and I think that's a strength too," Daniel Sedin said. "You can't always be loose and have fun and joke around. There's a time when you need to step up and be focused, and I think he was an expert at that."
After the Canucks traded Luongo back to the Panthers, he didn't coast from 2014-19. He wanted to do what he hadn't in his first stint with them: make the Stanley Cup Playoffs. The Panthers made it in 2015-16, when, at 36, he finished fourth for the Vezina.
"A lot of people thought I was just coming back to retire," Luongo said. "Obviously those are people who don't know me personally, and that's not who I am."