Ruotsalainen's next test is a date with Auston Matthews, Morgan Rielly and the Toronto Maple Leafs tonight at Scotiabank Arena. The Sabres will ice a young lineup featuring Casey Mittelstadt, Tage Thompson, Dylan Cozens, and Ruotsalainen, among others.
Though the focus for Buffalo is more on their own game than the opposition, Ruotsalainen admitted he's looking forward to lining up against a star-laden Maple Leafs roster.
"Of course," he said. "There's a lot of good players. Of course, it's a great chance to show how I can play against those guys. I just try to do my best and help the team win. I just have to enjoy every minute I touch the ice."
So far, the Sabres have enjoyed having him. Coach Ralph Krueger lauded Ruotsalainen's maturity and said it's been clear the forward developed a responsible game while leading his team in goals and ice time in Finland a year ago.
Krueger, with two decades of European coaching experience on his resume, is as qualified as anyone to speak about the transition to North American ice. He noted that Finland's rink are the smallest in Europe, though the playing style still presents an adjustment.
"The big thing is in Europe, a lot of the game ends up in that extra ice, which is a long way from the net, and it really spreads things out," Krueger said. "Here, you're automatically pushed closer to the danger zone, pushed closer to the scoring areas.
"For him, I think he's so far showed courage to go there and to play there. But that's the biggest adjustment you make because everything gets tighter, you get hit quicker, you've got less time and space."