[4] Hoost holds notable victories over Peter Aerts (4x), Branko Cikatić, Mirko Cro Cop (3x), Jérôme Le Banner (3x), Andy Hug (3x), Ray Sefo (3x), Musashi (2x), Mike Bernardo, Francisco Filho (2x), Sam Greco, Stefan Leko (3x), Mark Hunt, Cyril Abidi, and Glaube Feitosa.

[5] He played football for amateur club Hollandia until he was 15 years old, when he started training in kickboxing at the newly opened Sokudo Gym.

In 1999, Hoost won his second K-1 World Grand Prix title, beating Mirko Cro Cop by technical knockout in the third round.

Hoost aggressively attacked the arm again, forcing Le Banner down with only 94 seconds left in the match, winning by TKO and his fourth Grand Prix Championship.

[14] At AJPW's 2nd WRESTLE-1 event held in the Tokyo Dome, Hoost would defeat Sapp after delivering a chair shot and slap to the back of the head which led to a schoolboy pin.

In his first fight in over eight years, he scored two knockdowns en route to a unanimous decision victory over Thomas Stanley at Hoost Cup: Legend in Nagoya, Japan on 23 March 2014.

[18][19] He defeated Peter Aerts in their sixth meeting via unanimous decision on 19 October 2014 in Osaka to win the vacant WKO World Heavyweight Championship.

[21] While he lacked the sheer physicality of other heavyweights, he was able to succeed through his superior speed, accuracy, devastating combinations, and tactical brilliance.

Hoost's most feared strike was his signature low kick, which he utilized at the end of his combinations to cripple his opponent throughout the course of a match.

He was able to finish top competition such as Ray Sefo, Mirko Cro Cop, and Igor Vovchanchyn through his use of the low kick.

This allowed him to survive when more powerful fighters attempted to brawl, although this notably failed (twice) against the 350 pound Bob Sapp.