Caplan adds that Martin is now fully recovered from his season-ending hernia surgery.
Martin signed a two-year, $4 million contract that included $750,000 guaranteed after spending the first sour years of his career in San Diego.
Martin, 27, was with the Dolphins in 2013 and appeared in two games, making just one tackle. Pro Football Focus has him down for playing 33 snaps for Miami.
His best season came in 2011 when played in all 16 games for the Chargers and totaled 47 tackles and a single sack.