ホリー・ホルム
Gregory Jackson (born 1974) is an American mixed martial arts (MMA) trainer who co-owns Jackson Wink MMA Academy in Albuquerque, New Mexico, widely considered one of the top MMA training centers in the world. Jackson has trained many successful fighters, including former UFC Light Heavyweight Champion Jon Jones, former UFC Welterweight Champion Georges St-Pierre, former UFC Women's Bantamweight Champion Holly Holm, former Light Heavyweight Champion Rashad Evans, and a roster of other UFC contenders and World Extreme Cagefighting champions.