Celtics waive Rasheed Wallace

It looks like Rasheed Wallace is going to retire after all.

The Boston Celtics announced Tuesday that they have waived Wallace after coming to a mutual agreement under which Wallace plans to retire.

"We would like to thank Rasheed for everything that he did for this team and organization last season," said Celtics president of basketball operations Danny Ainge. "We would like to wish Rasheed and his family the best as they move on into the next phase of their lives. He will always be a member of the Celtics family."

Wallace, a center/forward and 15-year pro, averaged 9.0 points and 4.1 rebounds in 22.5 minutes per game last season, his first with Boston. Wallace was set to earn $13 million over the final two years of a three-year deal he inked with Boston last offseason, but he told coach Doc Rivers before Game 7 of the NBA Finals that it would likely be his last game.

The move gives the Celtics a roster spot to play with. They currently have 14 players under contract, with rookie Luke Harangody signing on Tuesday.

"One more piece is possible," Ainge said Tuesday during a conference call following the introductory press conference of Shaquille O'Neal. "I like the pieces we have at this stage and would be happy going into training camp with this team. It is possible though we could add another player, most likely for the veteran's minimum, possibly a trade, but the most likely scenario is for the veteran's minimum."

Both Ainge and Rivers suggested they'd like to add another shooter to the roster, adding some depth at a swingman spot that remains the team's biggest area of need following the departure of Tony Allen. Von Wafer and Marquis Daniels are all that's behind Ray Allen and Paul Pierce on the depth chart at shooting guard/small forward.

"We'd like to get a [shooting guard], we'd like to get one more shooter," Rivers said. "Von's a hell of a shooter and that's good for us, but we'd love to get another veteran shooter."

Rivers waited a beat before adding a punchline, "Preferably one under 38."

What remains unclear is what that means for Tony Gaffney and Oliver Lafayette, a pair of young players with non-guaranteed contracts for next season. The duo can come to camp in search of a roster spot, but Boston will have at least 14 guaranteed contracts at that point, and that's if they don't sign another veteran before camp opens.

The Celtics will start the year with Kendrick Perkins sidelined after offseason knee surgery, which makes even those final roster spots extra valuable at the start of the season.

Rivers did indicate that an addition could come after the season begins and also didn't close the door on a possible Wallace return, noting: "You never know when a March call happens," suggesting Wallace could be lured out of retirement for one more (abbreviated) title run.

Chris Forsberg is the Celtics reporter for ESPNBoston.com. Follow him on Twitter.