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Tonight is the NBA draft lottery, which is one way to build a team. The other way is free agency, which starts in just over a month. Many teams positioned themselves for this summer, expecting Dwight Howard, Chris Paul and Deron Williams all to opt out and become free agents. But Howard and Paul opted in, and now there is money to spend on a significantly weaker but nevertheless strong class. A handful of teams could be very active this summer. Among playoff