Falcons players said Hall was in the facility this week while the team continued offseason workouts. Hall, 31, did not immediately sign however.
Hall has torn both Achilles since the 2011 season.
"They still went through the medical with Leon," Quinn said Friday. "So we're still getting back and talking with the docs. So, nothing to report on that end yet. But still looking to add, if there's guys we think can compete to make the team better. But nothing to update you on that one."
Quinn was asked if Hall could help the team.
"Certainly he could," Quinn said. "But nothing to update on his scenario just yet."
The Falcons needed more depth at cornerback behind likely starters Desmond Trufant and Robert Alford. The plan going into last season was to have Alford play more of a nickel role as rookie Jalen Collins settled in outside opposite Trufant. However, Collins' first year was a total disaster. And he enters the 2016 season suspended for the first four games without pay after violating the league's policy on performance-enhancing drugs.
Since Collins won't be available for those four games, it makes sense for the Falcons to investigate other options, particularly after not drafting a cornerback. If the season started today, DeMarcus Van Dyke and Akeem King likely would be competing for time as the third cornerback.
We'll see how things progress with Hall, a 2007 first-round Bengals draft pick. Injuries marked much of the latter years of his time in Cincinnati. He tore both of his Achilles in separate incidents during the 2011 and 2013 seasons, respectively. Although he returned remarkably strong following the first tear, he has been a little slower getting back to form since the second one.
Neither Hall nor his Bengals coaches would say if he had lost a step after the second injury, but his role was scaled back. Hall played strictly at the slot cornerback position in 2015 after splitting more time there and on the boundary at earlier times in his career.
Consistency was the biggest issue for Hall the past two seasons. At times he would make timely defensive stops. At others, he would get badly beaten by opposing receivers for first downs or touchdowns.
For many, the play that defined Hall’s career after his second Achilles tear was the 94-yard touchdown pass he allowed against the Steelers in Cincinnati in 2014. On the play, then-rookie Martavis Bryant got quickly by Hall and completely burned him to go untouched for the long scoring reception.
It’s also worth noting that since his last Achilles tear, Hall has three interceptions and broke up 11 passes.
ESPN Bengals reporter Coley Harvey contributed to this report.