Defenseman Travis Hamonic, who was traded to Calgary by the New York Islanders on June 24, 2017, said Gaudreau, because of his size and speed, is hard to defend.
"He's one of those guys who's really not afraid to go to the hard areas," said Hamonic, who played for Islanders from 2010-17. "With that being said, a lot of times the hard areas are really physical spots on the ice, right? But you can't really hit him because of his size and ability to spin off you.
"He's waiting for you to kind of take a run at him and he's going to go the other way. As a lot of defensemen are in the League, you try to be hard on players. And it seems like the harder you are on him, the better he gets."
Gaudreau, who has 354 points (123 goals, 231 assists) in 357 NHL games, is often compared to another NHL all-star, Blackhawks forward Patrick Kane. Flames coach Bill Peters said both are "American guys, dynamic, play-making wingers who make other guys better."
Kane, who will make his eighth All-Star Game appearance, has long been a fan of Gaudreau.
"You saw last game against us, the way he works on his edges and is able to control the puck with his head up," Kane said. "He can beat you so many ways, with his speed or pulling up and slowing the game down.
"That team's been good and that top line's been one of the main reasons, with Johnny, [Sean] Monahan and [Elias] Lindholm. Seems like they have a lot of chemistry, they're working off each other."
Monahan is second on the Flames to Gaudreau with 54 points (23 goals, 31 assists). Lindholm, who was traded to the Flames by the Carolina Hurricanes on June 23, is third with 51 points (21 goals, 30 assists). Gaudreau credited those two with much of his success and said having Lindholm on his line has helped him shoot more. Gaudreau has 146 shots on goal in 45 games; he had 227 shots in 80 games last season.
"I think last year we played with Micheal Ferland, who was a little bit more of a shooter," Gaudreau said. "Lindholm, obviously, is a shooter as well, but he can see the ice really well. He can make some pretty high-end plays, so I think I just got an opportunity to shoot a little more with a player like that on my line."
Gaudreau put up steady numbers on offense in his first five NHL seasons. This season, he's producing that much more.
"He really wants to be the best and he wants to be that game-changer every single time he's on the ice," Hamonic said. "The things he can do with the puck, I could only dream of doing. Sometimes you just sit back and take a backseat on the ice and you just watch and go, 'Wow.'"