Lloyd Cox is from Marietta, Oklahoma. He did not grow up with a cutting horse background. He came to appreciate the sport in high school and decided to become a cutting horse trainer. He posted his first EquiStat check in 1985. He was inducted into the NCHA Rider Hall of Fame in 2000.
Lloyd Cox was the NCHA Leading Money Earning Rider in 2003 (earning $714,583) and 2010. His biggest single-year earnings were $798,318 in 2019.
His leading career earner is One Time Royalty (One Time Pepto × Royal Serena Belle × Shorty Lena) — the 2010 NCHA Futurity Open Champion, setting an all-time high score of 230 points, with $447,383 in career earnings. One Time Royalty was inducted into the NCHA Hall of Fame in 2013. Other major horses in his career include Dual Rey, TR Dual Rey, Stylish Play Lena, Hottish, Halreycious, Smart Lookin High Brow, Twiceas Reycy, Miss Woody Two Shoes, Cats Moosnshine, and Reydiculous. He also trained Nurse Rey — the dam of Dual Rey — who earned $65,586 in the cutting pen ridden by Lloyd.
