At the age of 19 he already was world heavy weight kickboxing champion.
In 1994 Peter became K-1 World champion for the first time.
Peter gained his 2nd and 3rd K-1 title in 1995 en 1998. In 1995 he became World Muay Thai Super Heavyweight Champion as well.
Peter got his nickname “Lumberjack” due to his devastating low kicks, a trademark of the Dutch style.