CLEVELAND, Ohio -- The Cavaliers plan to let expire the remaining $3 million left over from the Kyrie Irving trade last summer to use in trades, sources told cleveland.com.

When the Cavs traded Irving to the Boston Celtics last year for Isaiah Thomas, Jae Crowder, Ante Zizic, and two draft picks, they also created a $5.8 million trade exception -- which means the salaries they received from Boston were that much less than Irving's salary last year.

Cleveland used $2.8 million of that trade exception earlier this month when it acquired forward Sam Dekker from the Los Angeles Clippers. The Cavs have until Wednesday to use the remaining $3 million, but a source said such a trade was unlikely.

Cleveland has 12 players on its roster, with spots 13 and 14 reserved for restricted free agent Rodney Hood and David Nwaba, who has agreed to join the Cavs but is still ironing out contract details. For now, the Cavs plan to let camp invites battle it out for the 15th and final spot.

Then again, they have two more trade exceptions that expire on Oct. 15 -- two days before their season opener in Toronto. Cleveland has a $2.5 million trade exception for trading Richard Jefferson and a $1.3 million exception for dealing Kay Felder.

Remember, trade exceptions are not stackable, so the Cavs can't combine the exceptions for Jefferson and Felder to acquire a more expensive player.

When the Irving trade exception expires Wednesday, it will essentially close the book on a landmark trade in franchise history. The centerpiece of the deal on this end turned out to be rookie Collin Sexton, drafted with Brooklyn"s No. 1 pick (eight overall ) -- acquired as part of the Irving deal.

The Cavs used Thomas to trade for Jordan Clarkson and Larry Nance Jr. from the Lakers, and Crowder to land Hood from Utah. The other pick Cleveland landed from the Celtics -- Miami's second rounder in 2020 -- was sent to the Kings in February as part of the deal that brought George Hill to Cleveland.

The Cavs' first practice is Sept. 25.