Biggs reports that the Bears plan to sign veteran center Will Montgomery to replace Garza.
Garza, 36, has spent the last 10 seasons in Chicago and is a 14-year NFL veteran. He started 145 for the Bears and had signed a one-year extension in December 2014.
Montgomery spent last season with the Denver Broncos, starting eight games and appearing in all 16. He was previously a center for the Washington Redskins for five years.
- Brad Rowland