Allen, an unrestricted free agent, has spent his entire career with the Celtics  since being drafted in 2004. He excelled this postseason as a defensive stopper and played a critical role in containing Kobe Bryant , LeBron James , and Dwyane Wade .
Allen told WEEI.com  during the playoffs that he would like to return to the Celtics next season … and beyond.
‘I am a Celtic,’ he said. ‘I love being a Celtic. It’d mean everything in the world [return next season].’
He added, ‘I mean, things happen but I feel like I’m going to be a Celtic for life.’
Should Allen sign elsewhere, his departure would leave a huge gap in the Celtics second unit as the organization looks to rebuild its bench this summer.