The UFC today revealed that Brock Lesnar is once again suffering from Diverticulitis which rules him out of his main event encounter with Junior Dos Santos at UFC 131.

As a result Shane Carwin has now stepped in as his replacement against Dos Santos in a fight which will determine the next man to fight for the heavyweight title against current champion Cain Velasquez.

The change means an unexpected leap in caliber of opponent for Carwin who had originally been scheduled to face UFC newcomer Jon Olav Einemo in the co-main event of UFC 131.

While Carwin will no doubt relish the prospect of be once again within reach of a title shot, a fight with JDS will be a tall order not only at relatively short notice, but also following almost an entire year out since his fight due to surgery.

As for the Brazilian, the change in opponent will require some adjustments, though his focus on both his striking and wrestling for this camp will come in handy against Carwin given that those are his two strongest attributes.

Though the way the match-up came about is dissapointing, it is a fight that’s likely to excite the fans, with both Dos Santos and Carwin being primarily strikers, and two of the biggest hitters on the roster, with both having finished a raft of fighters by either KO or TKO.