The Oklahoma City Thunder led the NBA in blown fourth quarter leads last season and Kevin Durant wanted to play within an offense that had better ball movement and easier scoring chances.

Despite a coaching change from Scott Brooks to Billy Donovan, the offense often stalled. Durant and Russell Westbrook were a powerful offensive duo but they didn't always make each other better.

"Ultimately he got frustrated and felt that they had plateaued," said a person with insight into Durant's thought process. "[Donovan] came in, and he still had the same issues that he had with Russ under Scotty. The offense didn't change much. He still had to take a ton of contested shots every game; and that's when he had the ball at all."

The Warriors have been one of the NBA's best passing teams for several seasons and their system is about setting up great shots instead of merely settling for good ones.

"He's never going to have a game in Golden State where Steve Kerr has to say at halftime, 'You guys need to get Kevin the ball,' which happened in OKC," the same person said.