The Miami Heat have signed Andersen to a 10-day contract. The Heat also brought forward-center Jarvis Varnado back for a second 10-day deal.
Andersen worked out for the Heat about two weeks ago and remained in the team's plans.
Andersen has averaged 5.4 points and 5.2 rebounds in his NBA career. His last appearance was with Denver on March 25.
Owner Micky Arison announced the signings Sunday morning.