Mack is still reportedly considering a return to Cleveland, but will test the free agent waters.
The seven-year veteran nearly left the Browns in 2014, when he signed an offer sheet with the Jaguars, only to have Cleveland match it.
A three-time Pro Bowler, Mack was taken in the first round of the 2009 draft by the Browns out of California. He was named second-team All-Pro in 2013.
– Kenny Ducey