Fellers' riding career began at the age of 11 when he was given a two-year-old Appaloosa, McGuiness, for his birthday. The pair quickly grew close with the help of Fellers’ mother and local riding instructors. The short, stocky horse had a talent for jumping, and the pair eventually became winners from the West Coast U.S. Grand Prix circuit to Spruce Meadows in Canada. In 1991, Fellers was a member of his first U.S. team at the Pan American Games in Havana, Cuba, and his global success has spanned decades. The turning point of his career will be the meeting with Flexible, his life horse. The Irish stallion has offered Fellers the best wins he could ever dream about. The pair has still good years to come.