The Thunder have improved their contract offer to Scott Brooks, including a fourth year to the extension on the table. But sources say the two sides remain apart significantly on salary.

Brooks' contract will expire on Saturday if he doesn't sign an extension.

Sources say Brooks would immediately become a candidate for the Blazers if a deal isn't reached.

Brooks had been offered a three-year extension worth around $11 million. Brooks made $2.1 million in the final year of his deal this season.