The full list of tryouts for the Saints includes:
Williams, 29, was taken with the No. 28 overall pick back in 2013. He played out the final year of his rookie contract but the Broncos elected to not pick up his fifth-year option, which allowed him to test the open market as an unrestricted free agent.
The Titans signed Williams to a three-year, $16.5 million contract that included $7.25 million guaranteed last year before releasing him in a move that freed up $3,083,332 of available cap space this offseason.
Williams later signed a one-year contract with the Lions, but was recently released to make room for Damon Harrison.
In 2018, Williams has appeared in six games for the Lions and recorded six tackles and no sacks.
We have him featured in our Top 50 Available 2018 NFL Free Agents list.
Walker, 28, originally signed on with the Saints as an undrafted free agent out of Tulsa back in 2012. After two years in New Orleans, Walker signed a one-year, $1.75 million deal with the Lions back in March of 2015 and later returned to Detroit on another one-year contract.
The Rams signed Walker to a one-year, $775,000 contract last March only to be released soon after. Once Walker was cleared in the matter, he returned to the Rams on another one-year deal.
He signed with the Bills during offseason, but was released coming out of the preseason.
In 2017, Walker appeared in all 16 games for the Rams and recorded 23 tackles, one sack, a forced fumble, a recovery and four pass defenses. Pro Football Focus had him rated as the No. 110 interior defender out of 122 qualifying players.
Hughes, 29, is a former third-round pick of the Browns back in 2012. He spent over four years in Cleveland before he was released a few weeks into the 2016 season.
Hughes had a brief stint with the Patriots before signing on with the Buccaneers midseason. The Saints gave him a shot to compete for a roster spot during training camp, but he was released as their trimmed their roster down to 53 players coming out of the preseason.
The Bills signed Hughes to a one-year contract this summer, but was released a few weeks later.
In 2017, Hughes appeared in eight games and recorded 10 tackles for the Saints.