 The Sixers also re-signed Tyrese Maxey, Chris Paul headed to San Antonio, James Harden staying with the L.A. Clippers, Clay Thompson goes from Golden State to Dallas. Boston Celtics agree with Jason Tatum on a five-year contract extension worth $314 million. That's the largest contract in NBA history. The Celtics are also up for sale. NHL free agency Nashville with the big splash, signing former Tampa captain Stephen Stamkos and former