And he acted like it was no big deal.
"He scores his first goal," Avalanche forward Matt Calvert said. "I would have been pretty excited, and he's just, little fist bump, here we go. That's his demeanor, and it serves him well in this situation."
It's one thing to make your NHL debut. It's another to make your NHL debut at the most important time of year. It's yet another to make your NHL debut at the most important time of year and make an impact.
It says something about Makar and the Avalanche that he has been able to do this.
"I'm sure what goes through his mind is, 'Are guys going to accept me?' " MacKinnon said. "Or, 'Are guys going to shun me because I wasn't here this year? Are the fifth, sixth defensemen, are they going to treat me poorly because I'm taking their job?' "
Makar's new teammates put him at ease, inviting him out for dinner, telling him to play his game. Since the end of the first round, Calvert and his family have housed him in their basement.
"You don't really know what it's going to be like," Makar said. "But I came into this room, and probably within the first three minutes, everybody shook my hand. It just kind of gets me in the groove right away. I felt like I was a part of the group, and that's all a credit to them."
At the same time, Makar earned respect by showing he belonged on the ice.
"If you didn't play great and he's in the lineup, I'm sure some guys would be like, 'Maybe we should let him develop a little bit and just let him watch and learn,' " MacKinnon said. "But he's been dominant, so no one has a problem.
"He's such a nice person as well. He's a very humble person. He's got a good sense of humor. I haven't known him long, but he seems like a great guy."
* * *
One of Makar's favorite books is "Mindset." Carol S. Dweck, a Stanford psychologist, writes that people with a fixed mindset, believing abilities are fixed, are less likely to flourish than those with a growth mindset, believing abilities can be developed.
The most exciting part for the Avalanche is Makar has tons of room for growth.
You can see his raw ability easily. Imagine when he learns the nuances of the NHL, like where the line is in front of the net, how to position his body in the corners, when to join the rush and when to stay home.
"He's going to make his mistakes, whether it's defensively or offensively, turning pucks over," Calvert said. "Those are the little things that are easy to learn. But he's got the skill, he skates well and he's just so calm. ...
"Sometimes you expect a 20-year-old coming out of college, living in dorm rooms and all that with a bunch of buddies …"
Calvert didn't finish his sentence. Did you see "Animal House"?
"But he's very mature," Calvert said. "Good manners. Good western boy."
For now, all Makar needs to do is keep the Calverts' basement clean, focus on hockey and live his dream. His homework and the rest of his belongings can wait.
"Everything that's back at school some of the guys moved into a house off campus," Makar said with a laugh. "So hopefully when all this is done, somebody can send it back home for me."