But being top dog isn't as easy as it looks — a realisation Irving has come to as he's matured, which resulted in him calling James after a loss to Orlando on the weekend to apologise for being a hot-head at the Cavs.
"I'll tell you one thing, and obviously this is something that was a big deal for me because I had to call Bron and tell him, like, I apologise for being that young player that wanted everything at his fingertips," Irving told reporters after the win over Toronto.
"I wanted everything to be at my threshold, I wanted to be the guy to lead us to championships, I wanted to be the leader.
"I wanted to be all that and the responsibility of being the best player in the world and leading the team is not meant for many people.
"Bron was one of those guys that came to Cleveland and really tried to show us what it was like to win a championship, and it was hard for him, and sometimes getting the most out of the group is not the easiest thing in the world."
Irving scored a layup with 5:55 remaining in the fourth quarter against the Raptors to lock the score at 94-all to start the run.
The win snapped the Celtics' three-game losing streak and the Raptors' five game winning run.
Irving's exploits were also the first time since December 18, 2009 an NBA player has scored 27 points or more with 18 or more assists. He's also the first Celtics player in just under 25 years to reach the feat.
It comes after a frustrated Irving blew up about his side after its 105-103 loss to the Magic on Saturday
"The young guys don't know what it takes to be a championship level team, what it takes every day," he said at the time. "And if they think it is hard now, what do they think it will be like when we're trying to get to the Finals?"
After today's game, Irving was more circumspect.
"We've just got to be more consistent," Irving said in a postgame interview. "Once we do that, we'll run over everybody in this league, I guarantee it."