Benson subsequently made his professional debut in September 2015, winning ten straight fights before dropping two in a row via points decision in 2018.

[4] Benson joined the Meadowbank Amateur Boxing Club in east Edinburgh at age 13 and started taking classes under former Scottish super featherweight champion Mark Geragthy.

[13] He won one last national title in 2015 after moving back down to light welterweight, defeating longtime friend Jason Easton in the final.

[14] He made his professional debut that September, defeating Kristian Laight on points at the Meadowbank Sports Centre in Edinburgh.

[15] Shortly after his eighth fight, a victory over Marek Laskowski in March 2017, he suffered a back injury in sparring that hospitalized him and left him sidelined for seven months.

[16] After ten straight wins to begin his pro career, Benson suffered his first defeat on 30 June 2018, falling to former Prizefighter: The Welterweights winner Johnny Coyle via a 96–95 points decision in Belfast.

[20] Benson made his return to the ring on 22 March 2019 with a comfortable victory over Zoltán Szabó in Glasgow,[21] then improved to a 12–2 record with a close win over Renald Garrido.

[23] However, he was pulled from the event one day before his first fight by the British Boxing Board of Control, who refused to allow him to compete for medical reasons.