Employee stated that he was fueling the dozer. He pulled the fuel hose from the reel, turned and felt something pull in back. He went to his doctor, filed on insurance and disability in Oct. 2010. He did not tell the company to file as a workers comp injury. Was off again in Feb. 2011 for same injury but called on 2/22/11 & said to turn in as comp injury & would go to comp doctor.