According to a report from ESPN’s Chris Broussard , the Celtics  offered Rajon Rondo  and Jeff Green  to the Thunder for Kendrick Perkins  and Russell Westbrook  following last season’s playoffs.
Broussard credits sources with the information that the Celtics were looking for another scorer who can create his own offense and thought Westbrook might be available after his erratic postseason play. But Oklahoma City apparently was not interested.
Westbrook averaged 21.9 points and 8.2 assists per game last season. Rondo averaged 10.6 points and 11.2 assists.