Vickerson, 32, signed a one-year contract worth $950,000 with the Jets back in March. However, he wound up being placed on season-ending injured reserve before the start of the season and later released during roster cuts.
In 2014, Vickerson appeared in 15 games for the Chiefs in 2014 and recorded 12 tackles and a pass defense. Pro Football Focus has him down for playing 175 snaps last year to go along with a decent rating as a run-defender.
Smith, 25, is a former fifth-round pick of the Broncos back in 2013 out of Western Kentucky. He was unfortunately cut loose by the Broncos with a failed physical designation days before this year’s NFL Draft.
He has worked out for the Jets, Seahawks, Dolphins and Chiefs in recent weeks, but hasn’t received an offer.
In 2014, Smith appeared in 15 games for the Broncos, but recorded just 11 tackles and two pass defenses. Pro Football Focus has him rated as the No. 51 defensive end in a 4-3 system out of 59 qualifying players.
Shaughnessy, 28, was in the year of his final two-year, $4.4 million contract when he was among the Cardinals’ final roster a few months ago.
In 2014, Shaughnessy was limited to appearing in just eight games for the Cardinals after he was placed on short-term injured reserve. He finished the year with 17 tackles.