Miami Heat coach Erik Spoelstra has agreed to an eight-year contract extension worth more than $120 million, the most committed money in North American coaching history, sources told ESPN on Tuesday night. Spoelstra, 53, has established himself as one of the most respected and successful coaches in professional sports and the new deal reflects both his and the organization’s desire to keep him with the only franchise he’s ever worked for in the NBA. Spoelstra — who has collected two championships and reached the NBA Finals six times — is the NBA’s second-highest-paid coach on an annual basis, behind Gregg Popovich […]