The Oilers have scored 10 goals over their first four games of the season. Connor McDavid has factored into nine of them.
Edmonton's captain has four goals and five assists and is further cementing his place as the face of the National Hockey League.
"To me he's the best player in the league, so I'm not surprised that he's doing well," said Cassidy. "Certainly his production doesn't surprise me. He's around the puck, he plays a lot, he's effective, he attacks. It's gonna result in points most nights."
Bruins captain Zdeno Chara, who is in the midst of his 21st NHL season and will play in his 900th game with the Bruins on Thursday night, has played against some of the best players of all time (i.e. Wayne Gretzky, Mario Lemieux, and Sidney Crosby). He believes McDavid is worthy of that category.
"There is no secret," Chara said of how to defend McDavid. "Connor is probably the best player in the league as of right now. He's very explosive, very fast, very unpredictable. He sees three plays ahead before it happens. But his ability to skate and make plays at high speed are very unique. I said that last week, it's exceptional.
"You have a player like that that come around maybe once in 20-30 years - Wayne, Lemieux, Sid, you have guys who have come in every 20-30 years and they make a huge impact on the league.
"And he's the face of the league right now, he's the best player, and we're gonna probably have to wait another 20 years to see someone like that. Maybe sooner, but it's very special."