Celtics to introduce offseason additions

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The Boston Celtics will hold a news conference Monday afternoon to introduce what the team termed its "2015 offseason additions." The generic description hints that -- about three weeks after the initial agreements -- the Celtics will finalize deals early Monday to re-sign Jae Crowder and acquire David Lee from the Golden State Warriors.

Boston delayed completion of those deals in order to examine potential moves with a goal of maximizing remaining cap space. The Celtics made a minor swap, acquiring Perry Jones from the Oklahoma City Thunder during that period. But as most teams head into typical August hibernation, Boston will finalize its moves and essentially complete its summer roster construction.

Boston's offseason featured signing Amir Johnson (a two-year, $24 million contract), re-signing Crowder (five years, $35 million) and Jonas Jerebko (two years, $10 million) and acquiring Jones and Lee in trades. Crowder and Lee deserve some credit for patiently waiting for their moves to be finalized in order to allow Boston the opportunity to examine other moves.

By the time their offseason additions hit the podium Monday afternoon, the Celtics -- barring a last-minute phone call, will likely have ...

• Dealt Gerald Wallace and the nonguaranteed contract of Chris Babb to Golden State to acquire Lee.

• Leaped back above the salary cap. While the Celtics have lingered below the cap with roughly $5 million in room the past couple of weeks, the team will revert back to a more familiar position above the cap when Monday's moves are finalized. Depending on how Crowder's salary is structured, Boston will shuffle about $5 million over the cap. Don't fret -- the Celtics are in line to have a copious amount of cap space available next offseason.

• Signed first-round picks Terry Rozier and R.J. Hunter Jr. to their rookie-scale deals. Boston has maintained an extra sliver of cap room by delaying these perfunctory signings, but can safely process them now. Second-round pick Jordan Mickey signed a four-year deal last week, while Marcus Thornton will head overseas and start his pro career in Australia.

What's left to do after Monday's introductions?

• The Celtics will have 16 guaranteed contracts on the books for the 2015-16 season. There's still plenty of time to sort it all out before the start of the regular season, but somebody needs to go.

• Boston will finalize its training camp roster by adding as many as four invitees (those players are likely to land with the Maine Red Claws of the NBA D-League). The Celtics have already extended invites to Levi Randolph and Corey Walden.

The Celtics can still explore roster moves closer to the start of the season when needs might change around the league, but the heavy summer lifting is finally complete.