Kendrick Perkins  hasn’t even played a game yet for his new team in Oklahoma City, but he has agreed to a four-year contract extension with the Thunder. Yahoo’s Adrian Wojnarowski has the total value of the deal worth $34.8 million .
That’s a good deal for Perkins and it also helps explain why the Celtics  would have made him available at the trade deadline. Earlier this winter, they offered him a four–year extension worth about $23 million. That was the most the Celtics could have offered him under the current collective bargaining agreement. Perkins turned it down believing he could get more as unrestricted free agent.
“We offered him all that we could offer him,” team president Danny Ainge said in an interview with WEEI. “He wasn’t really interested in doing a contract extension, which I understand. He wanted to test the market. Last time he didn’t test the market and this time he wanted to see what his value was and that was a concern.”
But the Thunder had more room to maneuver under the cap, as detailed by Sham Sports  (scroll down to the bottom), and they used that extra space to up the offer for Perkins. It’s unclear how high the Celtics would have gone in an offer for Perkins had he reached unrestricted free agency, but it also seems unlikely they would have gone that far with him.
In the end, this deal works out well for the Celtics. Perkins stays out of the Eastern Conference and as an added bonus goes to a team that is now better-equipped to battle the Lakers. It also works out well for Perkins who outproduced his current contract and gets paid before the looming summer labor uncertainty. The Celtics got almost eight years out of the 27th pick in the draft and landed Jeff Green  in the process.