The Browns released fellow offensive tackle Rod Johnson to make room for Robinson, who has struggled since being selected by the then-St. Louis Rams in the 2014 NFL Draft out of Auburn.
Robinson, 25, served as a starter with the Rams for three years and played 46 games before being traded to the Detroit Lions for a sixth-round pick. The 6-foot-5, 330-pounder started six games with the club before an ankle injury sustained in an Oct. 15 game against the New Orleans Saints led to him being waived midway into the season.
Johnson missed his entire rookie season with a knee injury. He was selected by the Browns in the fifth round of the 2017 NFL Draft.