The 24-year-old Brown signed a non-guaranteed one year, $2.1 million contract this summer, $500,000 of which became guaranteed on opening night. The contract becomes fully guaranteed on January 10.
He enjoyed his best game of the season against the Los Angeles Clippers on Monday, putting up 6 points and 12 rebounds in 16 minutes.
Former Blazers who become trade eligible on December 15 include former Blazers Trendon Watford, Drew Eubanks Cam Reddish and Harry Giles III.
Other names include Max Strus, Dante Exum, Reggie Jackson, Dennis Schroder, Yuta Watanabe and Eric Gordon.
The remaining 2023 free agents — those who signed with their own team (with Bird rights) and a contract that is 120 percent greater than the previous season — become trade eligible on January 15.
Blazers forwards Jerami Grant and Matisse Thybulle are included in this category along with Giannis Antetokounmpo, Jaylen Brown, Dejounte Murray and Domantas Sabonis.