His unique fighting style blends Muay Thai kickboxing with grappling. In 2007, he clinched the Strikeforce Heavyweight Championship, and held it until 2010.
Later, in kickboxing, he seized the K-1 World Grand Prix Championship in 2010, cementing his status as a top striker.
Joining the UFC in 2011, Overeem faced top fighters like Mirko Cro Cop, Brock Lesnar and Stipe Miocic.
Initially known as "The Demolition Man," referencing his aggressive style and perhaps the cult Stallone and Snipes movie, Overeem's nickname shifted to the more brand-friendly "The Reem" as his fame grew internationally.
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His career stands out for its longevity and his expertise in diverse combat techniques, highlighted by vicious kicks and knockout knee strikes.