Erik Spoelstra and the Miami Heat have agreed on a long-term contract extension. Spoelstra is in his 16th season as head coach in Miami and his 29th overall with the franchise. He started in the video room and eventually becoming a scout, an assistant coach and then Pat Riley’s hand-picked successor as head coach in 2008. Spoelstra has three NBA championship rings, two of them coming as Miami’s head coach. A person with knowledge of the agreement who spoke Tuesday to The Associated Press on condition of anonymity because the terms were not revealed publicly said Spoelstra and the team agreed on an eight-year extension worth around $120 million.