Fought 2001 World Grand Prix champion Mark Hunt four times. Jerome won every fight except the second, and in their third fight became the first and only person to stop Mark Hunt with strikes in Hunt's entire competitive fighting career.
K-1 World GP 2000 Champion in Nagoya.
Lost his bout against New Japan Pro-Wrestling legend Tadao Yasuda at
Inoki Bom-Ba-Ye Festival in 2001.
Has a black belt in Karate Kyokushinkai.
Knocked out (knee to the head) welterweight Judo champion Yoshihiro
Akiyama under MMA rules in K-1 Hero's championship.