Prior to that he 'd eased to a unanimous decision win over Fabricio Werdum under the Strikeforce banner .
Overeem made his octagon debut a month later on the UFC 141 card in Las Vegas , stopping former champion Brock Lesnar in the first round via TKO .
Prior to that Overeem 'd eased to a unanimous decision win over Fabricio Werdum under the Strikeforce banner .
Overeem made his octagon debut a month later on the UFC 141 card in Las Vegas , stopping former champion Brock Lesnar in the first round via TKO .