One player that would likely not need much time to get up to speed in Sean McDermott’s defense is Daryl Worley. He was a third round pick by the Carolina Panthers in 2016 and played his rookie season under McDermott when he was defensive coordinator for the Panthers.
Worley spent the first two years of his career with the Panthers before joining the Raiders from 2018 to 2019. He left after that season as a free agent and joined the Dallas Cowboys but was released midway through the season.
The Buffalo Bills then signed Worley shortly after to their practice squad and he was called up for the game against the Arizona Cardinals when the Bills were dealing with a number of players missing due to COVID-19.
Worley would get signed off their practice squad a few weeks later by the Raiders and finish the season with them. Most recently, the veteran cornerback was on the practice squad of the Detroit Lions before being released earlier this month.
The biggest positive is that Worley does know this defense and at times has shown he can play well. Among the free agents out there, this seems like the player most likely the Buffalo Bills would add.