Shane Carwin will be pulling out of co-main event fight against Roy Nelson at UFC 125 due to a back injury. News broke out this morning from his own website www.shane-carwin.com . Shane wrote “I am going to pull out of the fight with Roy Nelson. As many of you know I have been having some back pain. I had an MRI yesterday and I have some damage that may really require surgery. If the doctors do not have to perform surgery then I will be out 8-12 weeks. If they do have to perform surgery I do not know how long I will be out of action.” This is just my opinion but we just may see Brock Lesnar sooner than expected and fill in for Carwin to fight Roy Nelson but again that’s only my opinion.