The NBA's free agency period is upon us, but the Oklahoma City Thunder is expected to remain relatively quiet all summer.

It's not because the team isn't interested in improving.

The Thunder simply lacks both roster spots and resources.

As many as 12 players from last season could return. And as many as three of this year's four draft picks could be signed. If so, that wouldn't leave any room at all on the 15-man roster.

But the Thunder has a small amount of wiggle room.

Hasheem Thabeet, Daniel Orton and DeAndre Liggins have non-guaranteed contracts for next year. One or all of them could be waived before the season to create additional roster spots. Then it becomes a money matter.

The projected tax threshold for next season is $71.6 million. Should the Thunder bring back Thabeet, Orton and Liggins, and sign only 12th overall pick Steven Adams and 26th pick Andre Roberson, the team would be only about $2 million below that mark.