Ballantine started training in Judo at a young age, in which he received a blue belt.
Ballantine became a student of Thom Harinck, a pioneer of kickboxing in the west, and was one of the first top fighters who fought out of Chakuriki Gym.
[2] Ballantine became a three-time European and a nine-time World kickboxing and Muay Thai champion.
He holds notable victories over fighters such as Ramon Dekkers (twice), Sangtiennoi Sor.Rungroj and Michael Kuhr.
After his kickboxing career, Ballantine also competed in mixed martial arts competition and won three Rings Dutch championships.