Chris “The Problem”Duncan

Chris Duncan is a Scottish professional mixed martial artist competing in the UFC lightweight division. The UFC lists Duncan as an active fighter who trains at American Top Team and uses the nickname “The Problem.” He was born in Glasgow, Scotland, and is identified by the UFC as a striker.

Duncan began training in mixed martial arts in 2014 and is listed by the UFC as a professional since 2018. Before becoming a full-time fighter, he worked as a shepherd in the Scottish Highlands and earned an HNC in agriculture. His early combat-sports background included regional lightweight titles and a purple belt in Brazilian jiu-jitsu under Marcos Nardini.

Duncan earned his UFC opportunity after competing on Dana White’s Contender Series, where he stopped Charlie Campbell in 2022. He made his Octagon debut at UFC 286 on March 18, 2023, and later established himself as a lightweight known for aggressive striking and submission threats. The UFC’s current athlete profile records his latest bout as a loss to Renato Moicano by submission on April 4, 2026, while still listing Duncan as active.