Grant averaged 8.4 points and 3.9 rebounds for the Thunder last season.
George averaged 21.9 points and 5.7 rebounds for Oklahoma City last season.
In very unsurprising news Chris Paul will re-sign with the Rockets.
McDermott has averaged 7.9 points per game and shot 42.6 percent from 3-point range in 264 career appearances.
Jordan, who opted out of his contract with the Clippers this week, averaged 12 points and 15.2 rebounds in 2017-18.
Barton averaged 15.7 points and 4.1 assists per game for Denver last season.
Durant, a nine-time All-Star, averaged 26.4 points and 6.8 rebounds last season.
Indiana had been looking to add guard Will Barton, but he is reportedly expected to re-sign with the Nuggets.
Another three African teams advanced to round two of FIBA Basketball World Cup qualifying.
Green averaged 10.8 points and 3.2 assists per game for Cleveland in 2017-18.