The top 3-year-old colt Mastery, who suffered a condylar fracture to his left front leg on Saturday at Santa Anita, underwent surgery on Monday afternoon at Santa Anita that "went very well," his trainer, Bob Baffert, said early Monday evening. Mastery returned to his stall in Baffert's barn at Santa Anita following the surgery. Mastery was pulled up immediately after winning the Grade 2 San Felipe Stakes on Saturday, and was taken from the track in the equine ambulance. Although initial concern was on his left hind leg, he began to show swelling in his left front leg, and radiographs revealed the fracture. The San Felipe was the fourth straight victory without a defeat for the unbeaten Mastery, who won all three of his starts at age 2, including the Grade 1 Los Alamitos Futurity. The San Felipe was his first start at 3 Mastery, a colt by Candy Ride, is owned by the Cheyenne Stable of Everett Dobson.