He attended Royal Palm Beach High School in Royal Palm Beach, Florida, where he played football as a receiver and defensive back, was named to Palm Beach Post and Sun-Sentinel first-team as a junior and senior, and received second-team All-Florida honors as a senior in 2008.[2][3][4][5][6] He then attended Hofstra University, for whom he played in eight games, and after it closed its football program he attended Towson University.[3][5][2] In 2010 for Towson he was named first-team All-CAA and first-team All-ECAC, as well as first-team All-American by College Sports Journal, and was named Towson University's Male Athlete of the Year.[2] In 2011 he was named first-team All-Colonial Athletic Association, and in 2012 he was named pre-season All-CAA and earned third-team pre-season All-America honors from The Sports Network.[2]
After entering professional football, he chipped away at remaining classes at Towson and in 2019 earned his degree.[7]
Dangerfield was signed to the Steelers' practice squad on November 5, 2014. He was released and re-signed to the practice squad throughout the 2014 and 2015[10] seasons before making the final roster in 2016.
On January 27, 2017, Dangerfield re-signed with the Steelers on a one-year deal.[11] On September 4, Dangerfield was waived/injured by the Steelers and placed on injured reserve.[12] He was released on September 8.[13] He was re-signed to the practice squad on October 16. He signed a reserve/future contract with the Steelers on January 15, 2018.[14]
On March 20, 2020, Dangerfield re-signed with the Steelers.[15]