CANTON, Mass. (AP) — The Celtics were supposed to enter the preseason as one of the favorites to emerge from the Eastern Conference on the heels of their surprise run to the NBA Finals under rookie head coach Ime Udoka.

That was before Udoka was suspended for the upcoming season following a monthslong investigation by an external law firm that found multiple violations of team policies for what sources told The Associated Press involve an inappropriate relationship with a woman in the organization.

The task of holding together the team and capitalizing on Boston’s championship window has falls to interim coach Joe Mazzulla, a 34-year-old rising assistant who was a candidate to land the Utah Jazz’s coaching job.

He’s had barely 72 hours to balance both learning of Udoka’s suspension and being handed a dream opportunity, but Mazzulla said he will take his time giving people time to “feel and heal” as the team prepares to open training camp on Tuesday.

“You can’t rush trust. You can’t rush healing. You can’t rush any of that,” he said to a packed room at Celtics media day on Monday. “Regardless of what has happened, we have a great roster and we have a great opportunity. That’s what I have to focus on.”

Mazzulla has been a Celtics assistant for two seasons. As a college player, he led West Virginia to a victory in the 2007 NIT and an upset over ninth-ranked Duke in the next year’s NCAA tournament. His only head coaching experience was a two-year stint from 2017-19 at Division II Fairmont State in West Virginia.

He will take charge of a Celtics roster that features only one player, 36-year-old Al Horford, his senior. Free agent acquisition Danillo Gallinari is the next closest in age — five weeks younger than Mazzulla.

But what Mazzulla lacks in time on the bench, he makes up for in endorsements from a roster full of players who beckoned Brad Stevens to keep his former assistant around following Stevens’ promotion to president of basketball operations.

Those same players remain adamant that Mazzulla can not only lead this team through difficult circumstances but also guide it back to the NBA Finals and another shot at a championship.

They also acknowledged their emotions remain all over the place, having found out about the Udoka news on social media before getting basic information from the team that didn’t amount to much more than was shared publicly. None of the players who addressed the media Monday said they had spoken with Udoka since his suspension was announced.

While they understand the privacy constraints that team officials are under, veteran Marcus Smart summed up the past handful of days this way: “It’s been hell for us.”

Jaylen Brown said he’s trying to remain optimistic as he digests everything.

“I believe in Joe. Joe believes in me. I’ve had conversations with him. I don’t think he sees a limit," he said. "I think he’s coming in excited. So I’m optimistic.”

Mazzulla said his plan is to build on the foundation and culture already established and not try to shake things up too much.

All-Star Jayson Tatum said the fact that Mazzulla was so intricately involved from a basketball standpoint in helping the Celtics make the on-court jump they did under Udoka is key.

“It’s somebody we’re comfortable with over the past three or four years,” Tatum said. “Same person, just in a different position now. But somebody we’re familiar with and have a lot of respect for.”

But Brown also acknowledged that the abrupt disclosure of Udoka’s suspension and the minimal details will loom as camp gets underway.

“It definitely puts your leadership to the test. Not just mine, but all of ours,” Brown said. “We’ll see. Obviously things haven’t gone the way we expected, but that’s life. The best thing you can do is move on.”

For now, Mazzulla said he will look to foster a spirit of collaboration.

“I think we have to do this together,” he said. “I don’t think we need to speed up decisions or speed up identity. I think we have to be patient. We have to rely on the foundations that we built as far as relationships. And the foundations and habits that we built on the basketball court, because they’re successful.”