Martin, 25, wound up signing on with the Cardinals as an undrafted free agent out of Bowling Green back in May of 2015. He was waived at the start of the season and was later signed to their practice squad.
The Cardinals re-signed Martin to a one-year contract this past March. Arizona waived him with an injury designation and he later reverted to injured reserve. However, the team decided to release him with an injury settlement.
In 2016, Martin appeared in eight games and recorded four tackles, no sacks and a fumble recovery.
Line, 27, signed with the Vikings as an undrafted free agent out of SMU back in 2013. He was on and off of their practice squad a bit, but managed to make the 53-man roster in 2015 and returned to the Vikings last year on a one-year, restricted tender worth $1,671,000.
The Saints signed Line to a deal back in August but waived him as they trimmed their roster down to the 53-man limit.
In 2016, Line appeared in 15 games for the Vikings and rushed for 15 yards on seven carries (2.1 YPC) and no receptions. Pro Football Focus has him rated as the No. 12 fullback out of 17 qualifying players.