Adderley is a product of the University of Delaware and a Philadelphia native. In four years with the Blue Hens, he posted 265 total tackles (165 solo), 33 pass breakups, 11 interceptions, 9.5 tackles for loss, four forced fumbles, two fumble recoveries and half a sack in 45 games. He returned 35 kicks for 863 yards (long of 92) and a touchdown, along with two punts for 19 yards.
