Carter, 30, is a former second-round pick of the Cowboys back in 2011. He played out his rookie contract before signing a four-year, $17 million contract with the Buccaneers in March of 2015.
The Buccaneers elected to cut him loose in 2016 and he eventually signed a one-year contract with the Jets. New York brought him back this last year only to cut him loose at the start of the regular season. Carter returned to the Jets a few days later.
In 2017, Carter appeared in 14 games for the Jets and recorded six tackles and no sacks.
Robinson, 28, is a former fourth-round pick of the Redskins. He played out his rookie contract after three years in Washington and later signed a one-year, $2,600,000 contract with the Giants in 2016.
Robinson returned to New York last year on a one-year contract and is once again testing the open market as an unrestricted free agent.
In 2017, Robinson appeared in six games for the Giants and recorded 32 tackles, no sacks or interceptions and two pass defenses. Pro Football Focus has him down for playing 292 snaps last year.