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Boston Celtics president of basketball operations Danny Ainge

(AP Photo/Steven Senne)

The Boston Celtics are among three teams known to interested in free agent point guard Sebastian Telfair, Fox Sports' Sam Amico reported Tuesday morning.

According to Amico, the Celtics, Phoenix Suns and Los Angeles Lakers have all expressed interest in Telfair. But for Boston, acquiring the 28-year old would be complicated.

Sources have told MassLive.com that the Celtics would like to add a third point guard behind Rajon Rondo (rehabilitating from a partially torn ACL) and Phil Pressey (an undrafted rookie out of Missouri), but the team doesn't currently have enough roster space.

Boston could open one roster spot by waiving Donte Green, who has a nonguaranteed contract. But unless my understanding of the collective bargaining agreement is mistaken, that would only clear enough cap space underneath the luxury tax for a rookie minimum contract. Celtics president of basketball operations Danny Ainge has hinted that the team doesn't want to pay the harsh repeater tax during a rebuilding campaign.

That means adding Telfair would likely require a trade. Boston still has logjams at shooting guard and power forward, both of which Ainge has indicated he'd like to eliminate.

Telfair also has a clouded history with the Celtics after playing 78 games with them in 2006-07. After the guard was arrested on a gun possession charge in April of 2007, team owner Wyc Grousbeck wrote an email to the Boston Globe describing how Telfair's nameplate had already been taken out of the locker room. He was traded to the Minnesota Timberwolves that summer as part of the package that landed Kevin Garnett.

Telfair averaged 5.6 points and 2.6 assists last season over 59 games with the Phoenix Suns and Toronto Raptors. He holds career averages of 7.4 points and 3.5 assists.