De Beer was born and raised in South Africa.[1] He played rugby and discus throw in high school at the Afrikaanse Hoër Seunskool.[1] He moved to America to attend the University of Arizona to play American football.[2] He redshirted his first season, but saw playing time for his final three seasons.[3]
Professional career
Buffalo Bills
After going undrafted in the 2018 NFL draft, de Beer signed with the Buffalo Bills on 11 May 2018. He was waived on 1 September 2018
.[4]
Green Bay Packers
On 27 November 2018 de Beer was signed to the Green Bay Packers practice squad. On 31 December 2018 he was signed to the active roster.[4] He was waived on 31 August 2019 and became a free agent.[5]
Indianapolis Colts
On 12 November 2019, de Beer was signed to the Indianapolis Colts practice squad, but was released three days later.[6]
De Beer was signed to the XFL's practice squad team, referred to as Team 9, on 30 January 2020.[9] He was signed off of Team 9 by the St. Louis BattleHawks on 9 March 2020.[10] He had his contract terminated when the league suspended operations on 10 April 2020.[11]