Johnson has signed with the Qingdao Eagles of the Chinese Basketball Association, Sportando reports.
Johnson was waived by the Grizzlies on Friday and his contract will be stretched over three years at a minimum cap hit, Michael Wallace of the Grizzlies' official site reports.
Johnson was traded from the Magic to the Grizzlies on Thursday in exchange for Jarrell Martin and cash, Adrian Wojnarowski of ESPN reports.
Johnson tallied 10 points (3-6 FG, 4-7 FT), two rebounds, one assist and three blocks across 22 minutes during Monday's 82-92 summer league win over the Raptors.
Johnson posted 11 points (5-8 FG, 1-2 FT), six rebounds and five assists across 18 minutes during Saturday's 90-76 summer league victory over the Nets.
Johnson posted 20 points (7-14 FG, 6-8 FT), eight rebounds, three assists and three steals across 25 minutes during Friday's 88-87 summer league loss to the Hornets.
Johnson was assigned to the Oklahoma City Blue of the G-League on Thursday, Erik Horne of The Oklahoman reports.
Johnson will start Tuesday's game against the Hawks, Royce Young of ESPN reports.
Johnson was assigned to the G-League's Oklahoma City Blue on Saturday, Brett Dawson of The Oklahoman reports.