Wissenswertes

Submitted Paul Buentello by strikes in the 2nd round on November 16, 2007 to become Strikeforce's first heavyweight champion. The event was "Strikeforce: Four Men Enter, One Man Survives". (November 2007)

On May 15, 2010, he defended the Strikeforce heavyweight championship for the first time at Strikeforce: Heavy Artillery (2010). He defeated Brett Rogers by a first round TKO. (Mai 2010)

Knocked out Todd Duffee at "K-1 Dynamite!! Power of Courage 2010" in 19 seconds to become interim Dream heavyweight champion. (Dezember 2010)

Became the only fighter in the world to hold the K-1 kick-boxing Grand Prix heavyweight title and the Strikeforce mixed martial arts heavyweight title. (Dezember 2010)

In the K-1 World Grand Prix tournament, Overeem defeated Tyrone Spong, Gokhan Saki, and Peter Aerts to win the K-1 World Grand Prix Championship. (Dezember 2010)

Made combat sports history by defeating Peter Aerts to become the K-1 World Grand Prix tournament champion. (Dezember 2010)

Made combat sports history by defeating Peter Aerts to become the K-1 Grand Prix tournament champion. (Dezember 2010)

Released from his UFC contract on the same date as Junior Dos Santos. The date was March 3, 2021.

Released from his UFC contract on March 3, 2021.