Stan "The White Rhino" Efferding (born November 6, 1967) is an American IFBB professional bodybuilder and a powerlifter competing in the Southern Powerlifting Federation (SPF). He held the all-time raw world powerlifting records in the 275-pound-class in the Total without knee wraps (w/o 2,226.6 lbs) and in the Squat without knee wraps (854 lbs). Due to his enormous physical strength, regularly competing in professional powerlifting contests along his career in professional competitive bodybuilding, Efferding is often referred to as the "world's strongest bodybuilder".