Elena Delle Donne is headed to Washington in one of the biggest trades in the WNBA's history. The 2015 MVP is joining the Mystics after being traded from the Chicago Sky on Thursday for Stefanie Dolson, Kahleah Copper and the No. 2 pick in this year's draft. ''I'm really excited about this next chapter in my career with the Mystics,'' Delle Donne said. More...