III: He has extensive coaching experience, much of it in NFC West
Greg Williams coached the Arizona Cardinals defensive backs for four seasons, from 2019 through 2022. Not only is that four years of facing NFC West teams, but it was one of the most recent chapters in his coaching career. That is always a solid quality for any coach, as it ensures that they have a firm understanding of opposing teams and their players.
His 15 years of NFL coaching has included the San Diego Chargers, Indianapolis Colts, Denver Broncos, Arizona Cardinals, and finally Green Bay Packers. Over that time, his team has appeared in the NFL Playoffs four different times. Not only does he have coaching experience, but he has postseason coaching experience as well.
IV: While a LB Coach, he has extensive background in coaching pass defenses too
He began his NFL coaching career as an assistant linebacker coach for the San Diego Chargers from 2009 through 2012. Since that time, he has been working with defensive backs and defending the pass for the past 11 seasons. He helped to lead the Chargers secondary (214.2 yards per game) to be listed among the NFL's Top 5 pass defenses in 2014.
Perhaps it's that comprehension of defending passes that makes him ideally suited to be considered for the team's LB Coach position. The Rams clearly need to up their game in terms of secondary, and Coach Williams expertise can go a long way in that area with the Rams linebackers. After all, who better to counter offenses and their attempts to isolate OLB Michael Hoecht in coverage on a wide receiver than a linebacker coach who has vast DB coaching experience?