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Mark Hunt was supposed to headline at UFC event in Australia opposite Marcin Tybura.

Mark Hunt has been having a pretty contentious relationship with the UFC as of late, though (*cough* lawsuit *cough), and now the UFC has pulled him from the event and replaced him with Fabricio Werdum.

Maybe it has something to do with Hunt admitting in a recent interview that he’s got some possible medical conditions related to all the hits to his noggin’ he’s taken, but…

Here’s the official statement from the UFC:

Due to medical concerns, heavyweight contender Mark Hunt has been removed from his UFC Fight Night main event bout against Marcin Tybura on Nov. 19.

Stepping in for Hunt against the No. 8-ranked Tybura at Qudos Bank Arena in Sydney, Australia will be former UFC heavyweight champion Fabricio Werdum, who is coming off a 65-second submission win over Walt Harris last Saturday in Las Vegas. In Tybura, the Brazilian star will be facing a surging contender who has won three straight, most recently defeating Andrei Arlovski in June.