Check your wire for CJ Mosley and maybe Reuben Foster (might never play again).
Justin Strnad looked interesting but missed his rookie season.
Check for Marcus Davenport... many have given up on him, but he's worth a stash in my opinion.
Maybe check the rosters of all the teams way over the salary cap... Saints, Eagles, Rams, Falcons, Chiefs... you might find some cut candidates and pick up their backup, like Zack Baun maybe being one of the last standing for Saints LBs or Davion Taylor maybe getting a shot on a rookie contract.
Also all of last season's rookies who didn't get a preseason... see if any of them got dropped. Simmons, Gay, and Murray are likely rostered, but check on all the DEs (Gross-Matos, Epenesa, Chaisson, Taylor) and the other LBs (Brooks, Wilson, Phillips).