The Cleveland Cavaliers are interested in the possibility of acquiring Celtics forward Paul Pierce, a league source confirmed to the Globe Monday, and reportedly the Cavaliers have discussed the possibility of offering multiple second-round draft picks in exchange for him. However, the source told the Globe any talks are very much in the preliminary stages. That said, Celtics president of basketball operations Danny Ainge would no doubt be interested in acquiring assets, such as draft picks, that could help rebuild the Celtics going forward. As the Globe recently reported, league sources have indicated that there is better-than-average interest for Pierce on the trade market, specifically from teams that are on the cusp of making the playoffs or are looking to make a deeper postseason push. To those teams, the sources said, Pierce's postseason experience and scoring are valuable, even if he would be 36 by the time the 2013-14 season begins. The Cavaliers, who hold the No. 1 overall pick in Thursday's NBA draft, were 24-58 last season – 13th out of 15 teams in the Eastern Conference.