Alistair Overeem

Alistair Cees Overeem is a Dutch former professional mixed martial artist and kickboxer. He is a former Strikeforce Heavyweight Champion, Dream Heavyweight Champion, K-1 World Grand Prix Champion, and was the first fighter to hold world titles in MMA and K-1 kickboxing at the same time. Overeem is also a one-time challenger for the UFC Heavyweight Championship.