Kevin Durant declined to opt in for the second year of his contract with Golden State and will become an unrestricted free agent, an expected move for the NBA Finals MVP who said he plans to do his part to keep the core of the champion Warriors intact to chase more titles. A person with direct knowledge of the decision confirmed Durant's intentions Thursday, speaking to the Associated Press on condition of anonymity because no formal announcement had been made. When the season ended, Durant made it clear he plans to stay with the Warriors.