The Celtics completed a surprising trade on Thursday when they sent center Kendrick Perkins to the Thunder for a package that included Jeff Green and Nenad Krstic.

The move left Boston somewhat depleted in the paint due to current injuries, but the move was one that executive Danny Ainge felt he needed to make for the long-term.

Perkins, who will become a free agent soon, was going to ask for roughly $10 annually, not a price Boston was going to pay for a center coming off major knee surgery. The Celtics offered Perkins four years and $22 million, but he was looking for about double that.

The move was similar from Oklahoma City's angle as well, as they may not have had the cap space or willingness to give Green the deal he'd desire.