“I’m happy to be returning as a Celtic,” he told WEEI.com via text message. “There’s no other place I wanted to be.”
According to a source familiar with the negotiations, WEEI.com confirmed the deal is worth $10 million annually. The second year is a player option.
Allen, who turns 35 this month, made it clear following the NBA finals  that he would like to return to Boston — ‘I’ll deal with that when the time comes, but it’s obvious that I don’t want to be anywhere else,’ he said after Game 7. He garnered attention from around the league, however, once he hit the free agent market. According to one report, LeBron James contacted Allen  about joining him, Chris Bosh and Dwyane Wade  on a “Dream Team.”
Allen averaged just over 16 points during last season and the playoffs. He set an NBA finals record by hitting eight 3-pointers against the Lakers. Allen will be entering his 15th season in the league and doesn’t expect to slow down any time soon.
‘I believe I’m so far ahead of the game that I’m able to play longer,” he told WEEI.com  during the regular season. “People look at basic standards of guys my age at 34, like some guys at 34, there’s no way they could play basketball right now. And I’m thinking at my age now, I can go even a few more years doing what I’m doing the way I’m doing it because for me, it’s not rocket science.”