07/30/2011 04:26 EDT | Updated 09/29/2011 05:12 EDT

Strikeforce cuts heavyweight champion Alistair Overeem

TORONTO - Strikeforce has released heavyweight champion Alistair Overeem.

UFC president Dana White confirmed the move in a text to The Canadian Press. Zuffa, the UFC's parent company, owns Strikeforce.

Strikeforce did not offer a reason for Overeem's release. But the six-foot-five 265-pound Dutch fighter recently dropped out of the Sept. 10 semifinals of the Strikeforce heavyweight tournament. CEO Scott Coker attributed that to injury.

Overeem has said he expected to fight in October, and that September was too soon. In an earlier interview posted on his website, he said it appeared Zuffa was threatening to cut him if he didn't fight in September.

"I need to be 100 per cent for these fights," he said on his website.

The website video includes footage of Overeem having tests July 29 in an Amsterdam hospital with a doctor, pointing to an X-ray, saying he had a fractured rib.