Pinkston has been sidelined all season after sustaining a high ankle sprain in an Aug. 15 exhibition against Detroit. The Browns placed him on the short-term injured reserve list, which allows teams to bring back a player after eight weeks.
It's been a hard road back for Pinkston. He started 16 games as a rookie in 2011, but had a life-threatening health scare last season when he developed blood clots in his lungs.
There was no guarantee Pinkston would be able to play again, but the former fifth-round draft pick worked his way back and was battling for a starting job when he got hurt against the Lions.
Pinkston tweeted that it was great to be back but called it "bittersweet" because Butler was released.