Gang Green is signing the 29-year-old wideout on Tuesday, NFL Network's Mike Garafolo reported, per a source.
ESPN first reported the signing.
Matthews forced his way out of Tennessee earlier this season after he wasn't happy with his playing time. In three games this season, the 6-foot wideout generated just three receptions for 11 yards. Matthews led the Titans in receiving the previous two years, compiling 945 and 795 yards, respectively.
The signing comes a week after Matthews suggested he wouldn't land with a new team this season.