Bradley helped the Bison win the NCAA Division II Football Championship in 1984, 1987, and 1988, or three of the four years he played.

[5] In 2009, under Bradley's guidance the Seahawks' defense allowed opponents to gain 356.4 yards (24th in the league) and to score 24.4 points per game (25th).

The Seahawks finished the season with a 5–11 record (3rd in the NFC West, 25th in the NFL), and subsequently replaced head coach Jim L. Mora with Pete Carroll.

The Jaguars ended the season 4–12, and Bradley was eventually named the head coach of the South team in the 2014 Senior Bowl.

[13] On January 20, 2017, the Los Angeles Chargers hired Bradley as defensive coordinator under head coach Anthony Lynn.

[14] After a 2017 season that saw the defense allow 17 points per game, the third-fewest in the NFL, Bradley received a three-year contract extension in January 2018.

[15] On January 12, 2021, Bradley was hired by the Las Vegas Raiders to be their defensive coordinator under head coach Jon Gruden, replacing Paul Guenther, who was fired during the 2020 season.

[16] On February 4, 2022, Bradley was hired by the Indianapolis Colts as their defensive coordinator under head coach Frank Reich.

[17] On March 7, 2023, the Colts announced that they would be retaining Bradley as defensive coordinator under newly hired head coach Shane Steichen.