He played college football for the Delaware Fightin' Blue Hens and was selected by the Chargers in the second round of the 2019 NFL draft.

[7] He played in the first four games of the 2019 season, primarily on special teams, before aggravating a hamstring injury.

[8] In Week 5 of the 2020 season against the New Orleans Saints on Monday Night Football, Adderley recorded his first career interception off a pass thrown by Drew Brees during the 30–27 overtime loss.

[9] Adderley announced his retirement from football at the age of 25 years old on March 16, 2023, after his contract with the Chargers expired.

[10] His first cousin twice removed, Herb Adderley, was an NFL cornerback for the Green Bay Packers and was inducted in the Pro Football Hall of Fame in 1980.