Derrick Williams and Kyrie Irving are 2 really good players. Lets say the draft order is
Cavs
Wizards
Cavs
So the cavs could get Derrick williams with the first pick, then since the Wizards don't need a PG they can pick some guy like a PF or C and then the cavs can get Irving.
and @ Flynn They have a 22% chance for the 1st overall pick. (cavs)