Celtics president Danny Ainge said Boston thinks Kyrie Irving's "best years are ahead of him."

"Kyrie is one of the best scorers in the NBA," Ainge said in the Celtics' news release to announce the blockbuster trade in which the Cavs sent Irving to Boston for Isaiah Thomas, Jae Crowder, Ante Zizic and Brooklyn's No. 1 pick.

"He has proven that on the biggest stage, the NBA Finals, the last three years," Ainge said. "He's been an NBA champion, an Olympic gold medalist, and a four-time All-Star. For all he's accomplished, we think his best years are ahead of him."

Thomas has been Boston's best player the last two seasons -- in which he was an All-Star, an All-NBA selection and the league's No. 3 scorer last season -- and endeared himself to the organization and community by playing hurt and through the death of his sister during the playoffs.