Eyenga was acquired from the Lakers as part of the four-team, 12-player deal in August that sent Dwight Howard to Los Angeles. He did not play in any of Orlando's six preseason games.
The 23-year-old native of the Congo has averaged 6.3 points in 51 games over two seasons with the Lakers and Cleveland. He was selected by the Cavaliers with the 30th overall pick of the 2009 NBA Draft and played in Spain from 2007-10.
Johnson signed with Orlando as a free agent last month and averaged 3.2 points in five preseason games. The 23-year-old Nevada product has averaged 3.3 points in 47 NBA games over two seasons with the Trail Blazers and Nets.