Johnson, 30, was the sixth overall pick in the forgettable 2000 NBA Draft. His last NBA action came as a San Antonio Spur in the 2007/08 season. At 6-foot-9, he can play either wing position, and owns career averages of 6.2 points and 2.2 rebounds.
Hart, 32, is a journeyman point guard, having played for nine teams in his nine-year career. He appeared in one game with the Timberwolves last season, but they dealt him to the Phoenix Suns for Alando Tucker in December. He is a 41.7 percent career shooter and not a scoring threat, but his 2.3-to-0.8 assist-to-turnover ratio indicates he can at least take care of the ball.
Johnson and Hart join Maurice Ager and John Thomas as the Wolves' camp invitees.