George Robert "G. R." Carter, Jr. (born February 6, 1968) is a retired professional American Quarter Horse jockey. On June 1, 2008, he became the all-time leading money-earning jockey in American Quarter Horse racing history surpassing the previous record of $41,405,207 in mount earnings. He continued to add to the record and retired with $75,317,283 in mount earnings. On July 6, 2013, Carter became the jockey with the most mounts in AQHA racing history after he piloted his 22,294th horse. Carter finished his career with 24,654 mounts on American Quarter Horses. On May 23, 2014, Carter became the all-time leader in wins aboard American Quarter Horses when he won his 3,632nd race passing Alvin "Bubba" Brossette. His final tally was 3,906 wins.