Bradley had his sights set on reuniting with Tom Cable, but he recently withdrew his name from consideration for the Niners' head-coaching job.
And now, Bradley is joining the AFC West, as he has agreed to become the new DC of the Los Angeles Chargers.
Bradley, fired as the head coach of the Jacksonville Jaguars late in the 2016 regular season, interviewed with Washington on January 11.
Among his players will be former Bison standout Kyle Emanuel, who just finished his second year with the Chargers as an outside linebacker.
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For a defense that ranked 29th in points allowed per game (26.4), Los Angeles is hopeful Bradley can turn things around.
The defensive-minded Bradley also served as the defensive coordinator for the Seattle Seahawks between 2009 and 2012. Fangio was the defensive coordinator under coach Jim Harbaugh from 2011 to 2014. Before that, Bradley coached with Jay Gruden as an assistant in Tampa Bay.
Bradley rose to national prominence as defensive coordinator for the Seattle Seahawks, overseeing the rise of the Legion of Boom in the Pacific Northwest.
Roberts has spent most of his career coaching tight ends, the same position he played during back-to-back Super Bowl runs with the Dallas Cowboys. The team also requested an interview with Carolina defensive backs coach Steve Wilks, but he was promoted to be the Panthers' defensive coordinator shortly thereafter. It was said that wherever Lynn landed, Bradley would follow.