Marcus Smart opened up about an underwhelming Boston Celtics season during an appearance on ESPN's The Jump.

“Let's call a spade a spade, right? It’s true. We were dysfunctional...We all took part in it," said Smart. 

Smart also discussed Kyrie Irving's impact on the team, spreading the blame for the disappointment beyond Irving.  

"He didn’t play up to the standard that he wanted to. But there’s four other guys out there with him, there’s a coach out there. We’re all supposed to be one team so you just can’t put the blame on one guy. Everyone could have done better, to not just help Kyrie but help the team and help each other.”

Darren Erman will become head coach of the Maine Red Claws in the G League.

The Red Claws are operated by the Boston Celtics.

Erman was on the staff of the Celtics under Doc Rivers and joined the Golden State Warriors as an assistant coach in 2013. Erman is coming off four seasons with the New Orleans Pelicans.

Head coaching experience is the one thing not on Erman's resume.

The Boston Celtics have signed guards Tremont Waters and Max Strus to Two-Way contracts.

Selected by the Celtics in the second round (51 overall), Waters averaged 15.6 points (42.3% FG, 80.7% FT), 3.1 rebounds, 5.9 assists, 2.5 steals and 32.7 minutes over 66 collegiate games at LSU.

Strus, 23, joins the organization after spending two years at DePaul University, where he ranked third in the Big East in scoring in 2018-19 (20.1 ppg). In addition to his high scoring output, Strus finished second among conference competitors this past season in three-point field goals (113), while recording 5.9 rebounds, 2.2 assists and a shooting mark of 42.9% from the field (36.3% 3-PT) in 35 games (all starts).

The Boston Celtics have entered into an agreement to purchase the NBA G League’s Maine Red Claws, subject to successful finalization of the transaction and G League approval. Upon completion, the Red Claws would be wholly-owned by the Celtics as the team’s official G League affiliate.

“Over the years, the G League and the Red Claws have become increasingly important to the Celtics and our player development efforts. We look forward to deepening both our ties with basketball operations and within the community, and further bringing the Celtics experience to fans in Maine,” said Rich Gotham, Boston Celtics Team President.

“The Celtics have been great partners with the Red Claws over the last ten seasons. We are thrilled that the Celtics will continue to build upon the success we have had in making the Red Claws an important part of the Maine community,” said Bill Ryan Jr., Maine Red Claws Chairman and Principal Owner.

The Boston Celtics have agreed to a partially guaranteed deal with Javonte Green.

Green will have an opportunity to earn the final roster spot on the Celtics.

Green averaged 10.8 points for the Celtics in Summer League.

The Boston Celtics have concerns about potential tampering on Al Horford ahead of free agency. The Celtics expected to negotiate a new deal with Horford when he opted out of his contract for the 19-20 season, but talks quickly broke down. Horford eventually signed with the Philadelphia 76ers.

"I don't know if you heard this, but the Celtics were, from what I am told, one of the teams that kind of stomped their feet about what they felt was tampering," said Brian Windhorst on The Hoop Collective Podcast. "Not with Kyrie, although that looked like it was lined up pretty far in advance, but with Horford.

"What happened with Horford, again from what I'm told, really upset the Celtics. They were thinking they were going to be able to negotiate with him. Talk to him about a new contract and all of a sudden it was like he already knew what his market was and he was out of there."

Jackie MacMullan countered that the Celtics had plenty of time to work on a new deal with Horford if they wanted to keep him.

"They were as surprised as we were that the money was available to Horford for the four-year deal they got," said MacMullan. "As you know, subsequent reporting revealed that the fourth year is not completely guaranteed because at the time, Elton Brand was getting killed for that deal. He was getting killed because the fourth year was being reported as guaranteed, but it isn't."

The Celtics similarly had a deal basically done with Kemba Walker before the start of free agency.

Danny Ainge began to believe Kyrie Irving was prepared to leave the Boston Celtics for the Brooklyn Nets as soon as March.

“He did express to me on a couple of occasions between March and the end of (the year) that he really wanted to go home,” Ainge said. “I got the impression at that point that he wanted to play in Brooklyn more than he wanted to play in New York.”

Ainge later called back the radio station to clarify what he meant.

Tacko Fall has an opportunity to make the 15-player final roster for the Boston Celtics, according to Danny Ainge.

Fall signed an Exhibit 10 contract with the Celtics. 

“We want to take his development very, very seriously. He’s a high priority for us to try to really develop into a player,” said Ainge.

The Celtics intend to bring in several players to battle for the final roster spot, league sources told Adam Himmelsbach of the Boston Globe.

The team recently waived Guerschon Yabusele to open up the final spot. 

The Boston Celtics have agreed to sign Vincent Poirier.

Poirier joins the NBA after spending the last six seasons playing professionally overseas, most recently with Kirolbet Baskonia Vitoria-Gasteiz in 2018-19 where he averaged 10.5 points (61.6% FG), 7.3 rebounds, 1.1 assists, and 1.0 blocked shots in 73 games (59 starts) across the Euroleague and Spanish ACB. He ranked third on his Baskonia team in scoring, while also leading the team in rebounding.

The Boston Celtics signed Carsen Edwards to a four-year deal worth a guaranteed $4.5 million, reported Adam Himmelsbach of The Boston Globe.

The first three years of the deal are fully guaranteed. The Celtics hold a team option for the fourth year.

Edwards was drafted with the 33rd pick in the 2019 NBA Draft.