Source: Raptors, Hawks swing 3-player trade

The Atlanta Hawks are putting themselves in position to be very active when the free-agent market opens Tuesday. Just over 24 hours before the free-agent frenzy was set to begin, the Hawks agreed to a trade with the Toronto Raptors that will help them open up more than $15 million in salary cap room, a person with knowledge of the agreement told The Associated Press on Sunday night. The Hawks …