Fans who were anticipating the clash between World heavyweight champion Cain Velasquez and MMA veteran Fabricio Werdum at UFC 180 received bad news a day or two ago when Velasquez was officially taken off the main event due to a knee injury. Their sadness turned back to joy, however, when the UFC announced that Mark Hunt would be stepping up to face Werdum -- with the interim heavyweight title at stake.http://bleacherreport.com/articles/2240169-cain-velasquez-out-with-injury-mark-hunt-in-vs-fabricio-werdum-at-ufc-180The match between perennial favorites Joe Lauzon and Diego Sanchez might also be due for a change as news came in yesterday that Lauzon was withdrawn from competition for unspecified reasons. No fighter has been called up as a replacement, making it entirely possible that the fight might be rescheduled for another event. http://bleacherreport.com/articles/2241476-report-joe-lauzon-out-against-diego-sanchez-at-ufc-180-no-replacement-named