The former third-round pick started 24 of his 26 games over three seasons with the Niners. Martin only played in five games last season before being placed on the injured reserve. In college, the lineman started 33 starts over three seasons with USC.
Martin will now serve as a backup for center J.C. Tretter. Tretter signed with Cleveland today on a lucrative three-year deal. After missing more than half of the 2016 season, Tretter will need a quality understudy. The Browns may feel they have that with Martin.
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