The Boston Celtics and guard Jameer Nelson have had preliminary discussions on his future role and "what if" possibilities before the February trade deadline, but buyout negotiations have not taken place yet, league sources told RealGM.

Nelson signed a two-year contract with the Dallas Mavericks last offseason, persuaded by the organization’s culture and an opportunity to start and compete for a Western Conference contender. Still, Dallas had scoured the market for an upgrade at point guard this season and acquired Rajon Rondo, ending Nelson’s brief tenure and sending him to a likely draft lottery team.

At 32, Nelson has cherished a role on a competing NBA team, but has now embraced his position with the Celtics. Over 11 seasons, Nelson is well-regarded as a professional and locker room voice.

Nelson spent his first 10 pro seasons with the Orlando Magic and started in his 23 games for Dallas. He’s averaged 12.4 points and 5.3 assists in his NBA career.