I believe they said it was his choice..he has spent most of his life on basketball and wants to pursue other things.
Yep.
Dooling's representative, Kenge Stevenson, said in a statement: "Keyon has decided that he has given the NBA twelve good years and that it's time to pursue other interests and spend more time with his family. He will never forget his time with the Boston Celtics."
In his only season in a Celtics uniform last year, Dooling emerged as a strong veteran presence in the locker room while overcoming early-season injuries and contributing to Boston's lengthy postseason run. He finished the season with averages of 4.0 points and 1.1 assists in 14.4 minutes. He was re-signed to a one-year veteran's minimum contract late in July.
"We'll miss Keyon's spirit and energy, both on and off the court," Celtics president of basketball operations Danny Ainge said in a statement released by the team. "The whole Celtics family wishes him well as he enters the next phase of his life."
Over the course of his 12-year career, in addition for playing for Boston, Dooling suited up for the Los Angeles Clippers, Miami Heat, Orlando Magic, New Jersey Nets and the Milwaukee Bucks. He finished his career with averages of 7.0 points and 2.2 assists, having shot 34.9 percent from 3-point range.