Samuel Ratsch, better known by his ring name Darby Allin, is an American professional wrestler signed to All Elite Wrestling (AEW) since 2019, where he is a one-time AEW World Champion, two-time AEW TNT Champion, and one-time AEW World Tag Team Champion alongside Sting. Allin debuted in 2015 for World Class Revolution (WCR) before competing for Evolve, Game Changer Wrestling (GCW), the World Wrestling Network (WWN), and numerous other independent promotions.

Known for his high-risk, unorthodox in-ring style, Allin’s wrestling persona draws heavy influence from punk rock and skateboarding culture. During his youth, Ratsch participated in track and field, played football, and briefly competed in amateur wrestling before attending film school in Arizona. Outside of wrestling, he lives a straight-edge lifestyle and has pursued interests in skateboarding and mountaineering.

In 2025, Allin began a Mount Everest ascent on April 8, set the world record for the highest elevation kickflip at 20,958 feet on May 5, and reached the summit on May 18. He was ranked No. 12 in the Pro Wrestling Illustrated PWI 500 in 2026 and was named Wrestling Observer Newsletter Non-Heavyweight MVP in 2021 and 2024.